Kinda stumbled upon the idea when I was getting a guild mate to run my rit to augary and he wasn't too sure if he could still tank the end, so I told him to get me to the end, I'd just use the vengefull build (it worked wonderfully). Few hours later I ran another guild mate to Sanctum from LA and he needed the mission and asked if I could run it... time to experiment.... 
Build:
Ritualist/Mesmer
Armor: Halcyons**(for energy) or Oracle's (for armor holding an item)
Optional Weapons: Brightclaw**, Wayward wand (restoration), Straw Effigy**(restoration), Collectors 20/20 offhand(restoration), Spiritgardens Ripose, or any other restoration wand/offhand or staff you want to use...
(note: ** indicates what I use on the run)
Stats
Skills
Arcane Echo
Vengeful Was Khanhei{E}
Vengeful Weapon
Mend Body And Soul
Illusion of Haste
Distortion
Mantra of Resolve
Ether Signet
Usage:
The Run:
For all people who are familiar with the run, or the mission even, this run is incredibly easy. Simply Take the Sceptor(which gives a lovely +1 energy regen bonus) and run up to first group for Inferno Imps. Cast Illusion of Haste and start running through them, to the area between the the first and second Imp mobs, if you become crippled and they start to come after you, use illusion of haste again and run a little farther, the aggro will break. Before you run through the next group of imps, regen energy and heal if you need to. Use the same technique for these imps, using illusion twice to break aggro. Next, waddle up the 2 executioners, throw on Illusion of Haste and distortion if you want(not really needed since alot of times they wont even bother running after you) and sprint past them, stopping before the next mob of undead to use illusion of haste to sprint past them. Continue to use illusion of haste between all mobs, using distortion while activating it to prevent interupts (and you thus being screwed over with a cripple) Once upon the bridge, take the left path up the hill, using illusion of haste + distortion to avoid hounds/executioners. You may get hit with desecrate enchantments, but the damage won't matter, just keep runnning. Continue to use this technique until you get the part with the Hounds in the narrow passage before you get to the swamp. This part you can either pull them back, throw on distortion + illusion of haste and sprint past them hoping to avoid getting blocked, or if you do get blocked, or find you can't get past this part, use echo + vengeful was Khanhei to kill them all fairly quickly (vengeful weapon speeds this up).
Swamp
Once upon the swamp, use illusion of haste and distortion to sprint to the RIGHT corner of the swamp, stopping before the large tree and not aggroing the Dragon Boss(formerly Rotscale) and his mob. Here, heal and regen, the wait for the boss' mob to patrol as far left as it goes, and then illusion of haste + distortion running along the right side of the wall, hitting the lever, using illusion of haste again, and running a little forward again to break aggro.
Finishing the run:
Once through the gate you can heal, and start running the through the Giant/Imp mobs one at a time, making sure to use mend body and soul if your health gets kinda low, all the while avoiding the Giants stomps (dont get close to em). Then just run up and talk to the Vhizier.
Second part of the run: Wait for the ghouls and such to run a little ahead to take the imps/giants aggro. You can then proceed to use illusion of haste + distortion to sprint past each white mantle patrol easily. Once you get to the beach, make sure that you have yourself selected, as sometimes I find it will select the Vhizier, and you will accidently use skills on him.
The fight:
Simple usage of the vengefull build basically. Cast Mantra of Resolve to prevent interupts. Echo vengefull was Khanhei, and alternate to the echoed version when the first ends, then the recharged version once the current one ends(with 40% recharge of skills chance I can often get 5 or 6 consecutive vengeful of khanhei's, more if it continues until echo recharges). If you get low on health during the fight with Khanhei up, use vengeful weapon or just spam it for extra damage. ***tip: dodge the searing heats, they can add up damage pretty fast if you dont have a large mob attacking you to keep your health up***. Then, you wait for echo + vengeful to recharge again, normally there is a boss still left, and the next wave is on its way, so use vengeful weapon + mend body and soul to heal if you need. Use echo+vengeful again once it recharges, and use ether signet if the vengeful drops your energy below 0 energy (it occurs if you have little energy since holding an items decreases max energy by a bit). This should keep you good on energy, and make sure mantra of resolve is refreshed if it ends. By the time your done with the second set of Vengeful was Khanhei's the boat is summoned, and theres a load of dead white mantle. Simply run on the boat, complete the mission, and get your drops in Amnoon
As of right now, I only run for tips and am only posting this because so many people that I have ran have complimented me on the build and usage of it and have suggested I share this on Guru.
Thanks for reading, post comments or suggestions freely
