Where to get lots of bleach shells?
furyhawk
I need to find a place to get bleached shells... So far, Dune of despair mission isn't working for me.
dargon
You need to kil lthe big sandworms, they drop them
furyhawk
Where do I find those big sandworms? As near to a portal as possible.
BrokenSymmetry
In all my time in the desert I have never picked up a bleached shell. So it seems that they are pretty hard to come by.
Ragnarok
its pretty hard to find a exact spot where worms are because they like to come out of the ground and knock you down. But i usually find that they come out of the ground near the teleporters
super dooper
One place that I've ALWAYS seen a Sand Wurm is to the east of Hero's Audience just before the first portal into Vulture Drifts.
Frost
East of Hero's Audience, Usually when sand elementals are around with the sand wyrm spawning....
In my opinion sand wyrm is one of the toughest creature in guildwar.
In my opinion sand wyrm is one of the toughest creature in guildwar.
Danica Kalmar
i got one after approx 10-15 sand worms
i know of one at the teleporter just outside of Dunes of Despair, i nearly always have one there, in seldom occurances 2. the side without the enchanted guys ofc.
i know of one at the teleporter just outside of Dunes of Despair, i nearly always have one there, in seldom occurances 2. the side without the enchanted guys ofc.
Tetris L
Yesterday I ran into an earth (sand?) elemental (boss?) half way from the 1st teleporter right outside Amnoon Oasis to Heroes Audience. The elemental wasn't much of a problem, but the sand worm(s) that he summoned slaughtered myself and all of my henchmen. I was pretty pissed off because I hadn't "unlocked" Heroes Audience yet and I was about to step into the portal. Now I gotta walk all the way from Amnoon Oasis again.

Alodarn
The problem with the worms, is that they are few and hard to kill .... if you take henchies, then they will also swallow up the drops ...
I've managed one on my wa/mo with only the monk npc along, and yep, the one near heroes is the best one to "farm" because you can pop in and out to reset him.
By far the most "fun" fight I've had is 3 worms at once
I've managed one on my wa/mo with only the monk npc along, and yep, the one near heroes is the best one to "farm" because you can pop in and out to reset him.
By far the most "fun" fight I've had is 3 worms at once
Frost
i've found a way to get a 50% chance of finding bleached shell outside Hero's audience by bringing Alesia along. But the killing of the wyrm fails if alesia dies.. a good way is to lure the sand elemental to the wyrm and let the wyrm kills them first hehe
Dogmeat
there are a couple of good spots where you can farm sand worms without being interupted by other creatures. the droprate for shells is pretty low though and I had to solo nearly 20 before getting the 5 shells I was after.
Aegri Somnia
Quote:
Originally Posted by Dogmeat
there are a couple of good spots where you can farm sand worms without being interupted by other creatures. the droprate for shells is pretty low though and I had to solo nearly 20 before getting the 5 shells I was after.
Very. Informational.
I bet the OP agrees.
I bet the OP agrees.
furyhawk
I run about the area around the sand elements... can't find 1 wurm at all.... did they move them? Any other place...............
Mercury Angel
Siege Worms drop them too.
One of the ascension missions has a couple of them around at set spots you can farm.
One of the ascension missions has a couple of them around at set spots you can farm.
jray14
Short story: ONLY consider bleached shells if you want the 15/-1/30 Idol (req 9 curses). If this is the case, just buy the shells from other players. Or if you're really stubborn, I'll give advice on farming them too.
Long story:
The first thing you need to ask yourself is "Why am I after bleached shells?" Let's take a look at the awesome collector post, page 7:
http://www.guildwarsguru.com/forum/s...7&page=7&pp=40
There is 1 collector giving a helmet in exchange for bleached shells. Forget that. Your time, effort, and money are all better spent at an armor crafter. If you're worried about the AL differences, then don't... 9 AL on a single piece is not going to matter between here and Droknar's Forge.
Then there is the other collector:
===== o. Lord Dorn Lendrigen (5 [color=black]Bleached Shells[/color]) =====
• Cane (chaos dmg:11-22, req. 9 illusion magic, 20% casting)
• Idol (energy+12, req. 9 curses, 15/-1/30)
• Air Staff (energy+10, lightning dmg:11-22, req. 9 air magic, 20/20)
• Holy Rod (fire dmg:11-22, req. 9 divine favor, 20% recharge)
• Crimson Carapace Shield (req. 9 tactics, 16/45/-2 while in stance)
The second item is the real treasure (the Idol). Bleached shells are the ONLY way to get it.
The Cane? Well, you can get a 20% recharge version at other collectors, which IMHO is better anyway.
The exact same Air Staff, Holy Rod, and Shield are available much more easily at other collectors. Just search that collector post for keywords.
Ok, so if you've gotten this far, hopefully you're being sensible and going for the 15/-1/30 Idol. Now, on to the topic at hand: how to get bleached shells.
IMHO, the best way to acquire bleached shells is to buy them. I accumulated 5 in under an hour by simply warping to all the districts in all the desert cities/missions and LA district 1 and Droknar's Forge. Name a price. Repeat a message like this in the trade channel: "WTB bleached shells @350g". Just be careful though: ANet changed the internal serial number of bleached shells recently, and older ones do not stack with newer ones. Keep an eye on your inventory and make sure that new shell purchases add to the same inventory slot. If you go to a collector with "2 bleached shells" and "3 bleached shells" in two different inventory slots, he will think you have only 2 total.
If you are intent on getting your own, seek out a wurm location that is near a zone portal and learn how to solo it. My favorite place is near the topmost eastern exit of Vulture Drifts. Draw the wurm as far east as possible, and no other mobs will bother you. Another good place is just east of Heroes Audience. Solo the wurm, exit/re-enter the zone, and repeat. However, I had to kill 12 wurms solo before I got a single bleached shell. That took over 2 hours. Not recommended, but if you must be self-sufficient, this is the fastest way.
FYI, I soloed the wurms with a W/Mo build. Lots of skill combinations work just fine. If other mobs happen to invade you, just sprint away and let the wurm eat them. They'll even damage the wurm a bit for you... so it's not a problem.
Long story:
The first thing you need to ask yourself is "Why am I after bleached shells?" Let's take a look at the awesome collector post, page 7:
http://www.guildwarsguru.com/forum/s...7&page=7&pp=40
There is 1 collector giving a helmet in exchange for bleached shells. Forget that. Your time, effort, and money are all better spent at an armor crafter. If you're worried about the AL differences, then don't... 9 AL on a single piece is not going to matter between here and Droknar's Forge.
Then there is the other collector:
===== o. Lord Dorn Lendrigen (5 [color=black]Bleached Shells[/color]) =====
• Cane (chaos dmg:11-22, req. 9 illusion magic, 20% casting)
• Idol (energy+12, req. 9 curses, 15/-1/30)
• Air Staff (energy+10, lightning dmg:11-22, req. 9 air magic, 20/20)
• Holy Rod (fire dmg:11-22, req. 9 divine favor, 20% recharge)
• Crimson Carapace Shield (req. 9 tactics, 16/45/-2 while in stance)
The second item is the real treasure (the Idol). Bleached shells are the ONLY way to get it.
The Cane? Well, you can get a 20% recharge version at other collectors, which IMHO is better anyway.
The exact same Air Staff, Holy Rod, and Shield are available much more easily at other collectors. Just search that collector post for keywords.
Ok, so if you've gotten this far, hopefully you're being sensible and going for the 15/-1/30 Idol. Now, on to the topic at hand: how to get bleached shells.
IMHO, the best way to acquire bleached shells is to buy them. I accumulated 5 in under an hour by simply warping to all the districts in all the desert cities/missions and LA district 1 and Droknar's Forge. Name a price. Repeat a message like this in the trade channel: "WTB bleached shells @350g". Just be careful though: ANet changed the internal serial number of bleached shells recently, and older ones do not stack with newer ones. Keep an eye on your inventory and make sure that new shell purchases add to the same inventory slot. If you go to a collector with "2 bleached shells" and "3 bleached shells" in two different inventory slots, he will think you have only 2 total.
If you are intent on getting your own, seek out a wurm location that is near a zone portal and learn how to solo it. My favorite place is near the topmost eastern exit of Vulture Drifts. Draw the wurm as far east as possible, and no other mobs will bother you. Another good place is just east of Heroes Audience. Solo the wurm, exit/re-enter the zone, and repeat. However, I had to kill 12 wurms solo before I got a single bleached shell. That took over 2 hours. Not recommended, but if you must be self-sufficient, this is the fastest way.
FYI, I soloed the wurms with a W/Mo build. Lots of skill combinations work just fine. If other mobs happen to invade you, just sprint away and let the wurm eat them. They'll even damage the wurm a bit for you... so it's not a problem.
Rednose
5 Bleached Shells will also get u Vile Scar tatoo (+1 Death magic AL60 ) from the Collector at Amnoon..
The collector, OR the drocknar is the only option.. and the Armorer at Drocknars takes 25 Parchment + 4 Feathers and 800 G to make the Tatoo..
I have a really hard time find ppl selling Bleached Shells, they simply drop WAY to rare
if the price at Parchement are 196g for one, the price will be arounf 5000 for the Armorer crafted tatoo.
The collector, OR the drocknar is the only option.. and the Armorer at Drocknars takes 25 Parchment + 4 Feathers and 800 G to make the Tatoo..
I have a really hard time find ppl selling Bleached Shells, they simply drop WAY to rare
if the price at Parchement are 196g for one, the price will be arounf 5000 for the Armorer crafted tatoo.
Thanas
I picked up 2 shells off seige worms drop whilst playing desert of despair and the rest I brought for about 200gp each from amnoon and augury rock. It took a while to buy the shells though. However I'm not very patient and got annoyed at those trying to sell me shells for 2 plat each.
Queto
Well, I need 5 bleached shells for the Crimson Carapace Shield (+45/-2 while stabnce).
I found a nice spot, found 2 shells in 1 hour
Those are really rare drops...
I found a nice spot, found 2 shells in 1 hour
Barinthus
Really? I run into sand wurms all the time, must be my luck. In Vulture Drifts, I seem to run into them in the southwestern corner of the map a lot. And in Prophet's Path in that path to the waypoint to Vulture's Drift. Those two spots are where I run into Sand Wurms the most.
wonderworm
The worm outside hero's audience is a pretty safe bet, I farmed my bleached shells there, too. If you are careful you only have to kill some of those seed things on the way there. Let the sand worm kill the patrolling sand elementals first.
I could solo the worm with my W/Mo using mending, watchful spirit, healing breeze, Bonetti's and Gladiators Defense (does the main damage there) but it took like 5 minutes each o_O
I could solo the worm with my W/Mo using mending, watchful spirit, healing breeze, Bonetti's and Gladiators Defense (does the main damage there) but it took like 5 minutes each o_O
Nick Hexon
I sell these when I get them, usually for 1k a peice.
Jetdoc
The easiest one to get to is right outside of Dunes of Despair, across from the teleporter (as previously said). You don't have to kill anything to get to him, if you run through the first batch of Forgotten.
When I get bored, I will go solo a sand wurm - it's a ton of fun if you don't use smiting spells (like so many farmers do). I liken it to two heavyweights going at it. Bringing Bonetti's and Shield Stance normally does the trick for me, along with normal healing and attack skills.
When I get bored, I will go solo a sand wurm - it's a ton of fun if you don't use smiting spells (like so many farmers do). I liken it to two heavyweights going at it. Bringing Bonetti's and Shield Stance normally does the trick for me, along with normal healing and attack skills.
I Tain I
Quote:
Originally Posted by jray14
Then there is the other collector:
===== o. Lord Dorn Lendrigen (5 [color=black]Bleached Shells[/color]) =====
• Cane (chaos dmg:11-22, req. 9 illusion magic, 20% casting)
• Idol (energy+12, req. 9 curses, 15/-1/30)
• Air Staff (energy+10, lightning dmg:11-22, req. 9 air magic, 20/20)
• Holy Rod (fire dmg:11-22, req. 9 divine favor, 20% recharge)
• Crimson Carapace Shield (req. 9 tactics, 16/45/-2 while in stance)
The second item is the real treasure (the Idol). Bleached shells are the ONLY way to get it.
The Cane? Well, you can get a 20% recharge version at other collectors, which IMHO is better anyway.
The exact same Air Staff, Holy Rod, and Shield are available much more easily at other collectors. Just search that collector post for keywords. Actually.. the shield is the best thing there
other collector with it was changed, and none of the other CC shields are 'in stance'
===== o. Lord Dorn Lendrigen (5 [color=black]Bleached Shells[/color]) =====
• Cane (chaos dmg:11-22, req. 9 illusion magic, 20% casting)
• Idol (energy+12, req. 9 curses, 15/-1/30)
• Air Staff (energy+10, lightning dmg:11-22, req. 9 air magic, 20/20)
• Holy Rod (fire dmg:11-22, req. 9 divine favor, 20% recharge)
• Crimson Carapace Shield (req. 9 tactics, 16/45/-2 while in stance)
The second item is the real treasure (the Idol). Bleached shells are the ONLY way to get it.
The Cane? Well, you can get a 20% recharge version at other collectors, which IMHO is better anyway.
The exact same Air Staff, Holy Rod, and Shield are available much more easily at other collectors. Just search that collector post for keywords. Actually.. the shield is the best thing there

Vicha
Here, you can find "Guivre des sables" (in French). At one point, I fought 3 of those sand worms in the same spot, sometimes two, most of the times only one. I finally quit. Not one of those worms dropped any shells, in 10 consecutive attempts.
In less than half an hour, going to all the places in the desert, I had bought five Bleached Shell @ 350 gp ea. No problem at all.
Savio
Quote:
Originally Posted by I Tain I
Actually.. the shield is the best thing there
other collector with it was changed, and none of the other CC shields are 'in stance'
Pre-SF, there was a collector just outside of Camp Rankor that would take 5 Frosted Griffon Wings for a 45/-2 stance shield. Post-SF, the bleached shell one is the only place you can get it.

Slade xTekno
Quote:
Originally Posted by Vicha
Here, you can find "Guivre des sables" (in French). At one point, I fought 3 of those sand worms in the same spot, sometimes two, most of the times only one. I finally quit. Not one of those worms dropped any shells, in 10 consecutive attempts.
In less than half an hour, going to all the places in the desert, I had bought five Bleached Shell @ 350 gp ea. No problem at all. I think the problem lies in the fact you have a full load of henchies with you.
free_fall
Yes, the one to the east of Hero is the most reliable. Another one always pops up to the west, too, just past the group of sand elementals with the boss in it.
When I was playing my W/Mo, me & the henchies tangled with that group and Alesia and I managed to run away. A devourer popped up and as I was fighting him, the sand worm came up. I managed to finish the devourer, and with Alesia healing me, I managed to take the worm down by myself. Didn't get a shell but, then, I wasn't looking for them at the time, either.
When I *was* trying to farm them with my necro the other day, I snagged one from the one to the east *and* the one to the west on the same run (and this with a full group of henchies, what are the odds on that!). The other three I bought.
When I was playing my W/Mo, me & the henchies tangled with that group and Alesia and I managed to run away. A devourer popped up and as I was fighting him, the sand worm came up. I managed to finish the devourer, and with Alesia healing me, I managed to take the worm down by myself. Didn't get a shell but, then, I wasn't looking for them at the time, either.
When I *was* trying to farm them with my necro the other day, I snagged one from the one to the east *and* the one to the west on the same run (and this with a full group of henchies, what are the odds on that!). The other three I bought.
Demon Rebel
Sand Wurms are a pain to tangle with if your not looking for them...
Currently I have have been playing with the devourers and drakes outside of elonas, able to solo those with no problem with my W/Me. But there are Wurms all over the place to the north east of the Elonas gate. I have run into 2 at a time there, only to do balanced stance and try to walk away as they knock me down... or try.
I am thinking of switching 2nd'arys and going for a Mo to do these uber farming builds.
Currently I have have been playing with the devourers and drakes outside of elonas, able to solo those with no problem with my W/Me. But there are Wurms all over the place to the north east of the Elonas gate. I have run into 2 at a time there, only to do balanced stance and try to walk away as they knock me down... or try.
I am thinking of switching 2nd'arys and going for a Mo to do these uber farming builds.
Akaji
Swords are underestimated. Just started farming the wurms today, takes me about 30 seconds of fighting to kill one with combining stances (Shield, Gladiator's, Bonetti's) and ripostes (Riposte, Deadly Riposte) with Parasitic Bond being my only form of healing (I have my Signet equipped for backup, but I have not needed to use it).
Mr D J
lol i killed about 10 of em didnt get a single shell, then just went to amnoon and bought em for 1k each

audioaxes
yes those shells are pretty hard to find..... took forever for my bro and i to farm up 10
Epinephrine
I've done numerous runs to kill these buggers and have one shell to show for it. Not trivial to fight them, and a pain to do it. There is another one that is easier to get to in a way, warping south of Heroes Audience and back in resets the worm in the narrow pass, but you have to be able to handle the elementals and the scarabs (enchantment stripping) so it's not as easy I suspect, unless you are farming with a build that needs no enchants.
sludgy
It even takes awhile to find people selling them for 1k each but I finally got my 5
ghostlyranger
i get my bleached shell from "dune of despair" mission farming on siege worm, it is not new method. but it is quite fast, usually will get one shell per mission. as a ranger i use the following skill
dust trap,
barb trap,
flame trap,
apply poison,
distracting shot,
escape,
dodge,
troll unguent
leave the ghostly hero in the starting area, and just run through all the losaru.
ignore the first siege worm, (becoz need ghostly hero to bring the gate) and keep on running until u see the second one,
now dun run directly into the worm, coz it will agro nearby losaru to attack u. i usually run toward somewhere near the mesmer mob(not sure wat it call), but dun agro them, if u do it correctly. no monster will agro on u. now just run into the siege worm, distract, apply poison and lay trap.
after killing the first one, u can move on the second one by using the nearby bridge, but dun run into the bridge again, coz usually it will be block by a losaru. wait him go away first.
dust trap,
barb trap,
flame trap,
apply poison,
distracting shot,
escape,
dodge,
troll unguent
leave the ghostly hero in the starting area, and just run through all the losaru.
ignore the first siege worm, (becoz need ghostly hero to bring the gate) and keep on running until u see the second one,
now dun run directly into the worm, coz it will agro nearby losaru to attack u. i usually run toward somewhere near the mesmer mob(not sure wat it call), but dun agro them, if u do it correctly. no monster will agro on u. now just run into the siege worm, distract, apply poison and lay trap.
after killing the first one, u can move on the second one by using the nearby bridge, but dun run into the bridge again, coz usually it will be block by a losaru. wait him go away first.
sp3ct3r
the shells are worth 1k. buying them for less is making proffit out of noob players, personally when i need shells to get the collector shield i usually buy them for 1k since these things are so rare and so hard to find and i feel bad scamming ppl.
But i get really mad when i see ppl selling the shield for 20~30k :| this is soo bad.. when will ANET end this by making auction house a reality??
But i get really mad when i see ppl selling the shield for 20~30k :| this is soo bad.. when will ANET end this by making auction house a reality??
MaglorD
Quote:
Originally Posted by sp3ct3r
the shells are worth 1k. buying them for less is making proffit out of noob players, personally when i need shells to get the collector shield i usually buy them for 1k since these things are so rare and so hard to find and i feel bad scamming ppl.
But i get really mad when i see ppl selling the shield for 20~30k :| this is soo bad.. when will ANET end this by making auction house a reality?? The shield is exactly the same as Grognar's shield, which sells for 30-40k though.
But i get really mad when i see ppl selling the shield for 20~30k :| this is soo bad.. when will ANET end this by making auction house a reality?? The shield is exactly the same as Grognar's shield, which sells for 30-40k though.
Lichtenberg
LOL u guys know that only seige worms in dunes of despair drop them right thats y there so rare since theres only like 3 in the mission
drunk_baron
Wurm Farmer - out of dunes of despair, run past forgotten (rezone if they are too close to teleporter) - run around a bit till a wurm attacks, hopefully only 1 or 2 if 3 I died. I use Glad's - shield - Glad's - bonetti's - bonetti's and repeat...during Glad's and shield I use sever + galrath but keep my eye on the adrenaline so I have enough for bonetti's when I need it. Made 4 shells out of about 8 wurms, now have the shield
Warrior/Ranger
Level: 20
Strength: 3 (2+1)
Swordsmanship: 14 (12+2)
Tactics: 14 (10+4)
Wilderness Survival: 8
Gladiator's Defense [Elite] (Tactics)
For 11 seconds, you have a 75% chance to block incoming attacks. Whenever you block a melee attack this way, the attacker suffers 33 damage.
Energy:5 Cast:0 Recharge:30
Shield Stance (Tactics)
For 19 seconds, while wielding a shield, you have a 75% chance to "block" incoming attacks, but you move 33% slower.
Energy:5 Cast:0 Recharge:60
Bonetti's Defense (Tactics)
For 11 seconds, you have a 75% chance to "block" incoming melee attacks and arrows. You gain 5 Energy for each successful melee attack blocked. Bonetti's Defense ends if you use a skill.
Adrenaline:8
Galrath Slash (Swordsmanship)
This attack strikes for +37 damage if it hits.
Adrenaline:8
Sever Artery (Swordsmanship)
If this attack hits, the opponent begins Bleeding for 24 seconds, losing Health over time.
Adrenaline:4
Troll Unguent (Wilderness Survival)
For 10 seconds, you gain Health regeneration +7.
Energy:5 Cast:3 Recharge:10
Healing Signet (Tactics)
You gain 145 Health. You have -40 armor while using this skill.
Energy:0 Cast:2 Recharge:4
Storm Chaser (Wilderness Survival)
For 14 seconds, you move 25% faster, and you gain 3 Energy whenever you take elemental damage.
Energy:10 Cast:0 Recharge:30

Warrior/Ranger
Level: 20
Strength: 3 (2+1)
Swordsmanship: 14 (12+2)
Tactics: 14 (10+4)
Wilderness Survival: 8
Gladiator's Defense [Elite] (Tactics)
For 11 seconds, you have a 75% chance to block incoming attacks. Whenever you block a melee attack this way, the attacker suffers 33 damage.
Energy:5 Cast:0 Recharge:30
Shield Stance (Tactics)
For 19 seconds, while wielding a shield, you have a 75% chance to "block" incoming attacks, but you move 33% slower.
Energy:5 Cast:0 Recharge:60
Bonetti's Defense (Tactics)
For 11 seconds, you have a 75% chance to "block" incoming melee attacks and arrows. You gain 5 Energy for each successful melee attack blocked. Bonetti's Defense ends if you use a skill.
Adrenaline:8
Galrath Slash (Swordsmanship)
This attack strikes for +37 damage if it hits.
Adrenaline:8
Sever Artery (Swordsmanship)
If this attack hits, the opponent begins Bleeding for 24 seconds, losing Health over time.
Adrenaline:4
Troll Unguent (Wilderness Survival)
For 10 seconds, you gain Health regeneration +7.
Energy:5 Cast:3 Recharge:10
Healing Signet (Tactics)
You gain 145 Health. You have -40 armor while using this skill.
Energy:0 Cast:2 Recharge:4
Storm Chaser (Wilderness Survival)
For 14 seconds, you move 25% faster, and you gain 3 Energy whenever you take elemental damage.
Energy:10 Cast:0 Recharge:30
Doctor Death
Personaly I prefer to collect items myself rather than buy them.
I found that for farming Bleached Shells the quickest way was to kill the first 2 seige worms in the Dunes of Despair Mission. For me it the drops were better here than farming the worms that can be found east of Dunes or elsewhere.
Build: W/Mo
Attributes: Healing 8
Strength 13
Axe 14
Equipment: Set 1: Axe (any mods except -1 energy degen)
Shield (str req, enchant bonuses pref)
Set 2: Axe (zelous mod)
Sheild (same as first)
Skills:
1. Sprint
2. Frenzy
3. Penetrating Blow
4. Eviscerate
5. Executioners
6. Disrupting Chop
7. Healing Breeze
8. Mending (yes mending
)
The run should not take more than a few mins as this build causes lots of damage quickly.
First start by casting mending and speak to ghost. when doors open speak to him again so that he stays and set off on a run towards the worms (make sure weapon set 1 is equiped so energy regens).
run past the groups of Losaru until you are up to the archer group near the first worm. When level ,sprint past them and head towards/and cross the bridge on the left (use healing breeze if required). Once over the bridge the losaru should not be following and you should be at about half health due to siege attacks and arrow hits. Procced at a run to attack the first worm from the back. Switch to weapon set 2 and go mental on its wormy ass by keeping frenzy up at all times (dont forget to Disrupt its attack
).
For the second worm just run back over the bridge and staying to its left sprint past the group of losaru towards the Storm Kin. They should fall back just before you reach the Storm Kin(DO NOT AGGRO THE STORM KIN).
follow the retreating losaru and sneak around to attack the second worm.
Rinse and repeat.
Drops are poor but you can get every other run at least.
My drops are probably 25-33%.
I found that for farming Bleached Shells the quickest way was to kill the first 2 seige worms in the Dunes of Despair Mission. For me it the drops were better here than farming the worms that can be found east of Dunes or elsewhere.
Build: W/Mo
Attributes: Healing 8
Strength 13
Axe 14
Equipment: Set 1: Axe (any mods except -1 energy degen)
Shield (str req, enchant bonuses pref)
Set 2: Axe (zelous mod)
Sheild (same as first)
Skills:
1. Sprint
2. Frenzy
3. Penetrating Blow
4. Eviscerate
5. Executioners
6. Disrupting Chop
7. Healing Breeze
8. Mending (yes mending

The run should not take more than a few mins as this build causes lots of damage quickly.
First start by casting mending and speak to ghost. when doors open speak to him again so that he stays and set off on a run towards the worms (make sure weapon set 1 is equiped so energy regens).
run past the groups of Losaru until you are up to the archer group near the first worm. When level ,sprint past them and head towards/and cross the bridge on the left (use healing breeze if required). Once over the bridge the losaru should not be following and you should be at about half health due to siege attacks and arrow hits. Procced at a run to attack the first worm from the back. Switch to weapon set 2 and go mental on its wormy ass by keeping frenzy up at all times (dont forget to Disrupt its attack

For the second worm just run back over the bridge and staying to its left sprint past the group of losaru towards the Storm Kin. They should fall back just before you reach the Storm Kin(DO NOT AGGRO THE STORM KIN).
follow the retreating losaru and sneak around to attack the second worm.
Rinse and repeat.
Drops are poor but you can get every other run at least.
My drops are probably 25-33%.