folks through Galen's quests and literally answering over 100 questions,
I've decided to pass on my expertise on these little errands.
(I use it for grinding new characters, great for going to level 3 to
20 in one night.

This is the (From what I've found) the easiest, least stressful method
for doing all Krak Flamewhip's quests and Galen's quest
First off, make sure you talk to him prior to entering the Furnace.
This should be a no brainer, but hey.
Secondly, after talking to him and starting the quest, head down to Krak
and take the following quests:
Cold One
Gathering Resources
Unruly Slaves
You might want the extra fire...err, icepower of the Frost Golems with
you for a while, so hold off on doing Cold one for right now. Head out
past Krak into the first main room, and use them to clear it out of all
baddies. It makes things much easier later on. I use Master Gears on all
3 doors, simply for the convenience of not having to do it later. Get the
Ore out of the Ore Boxes you find, and head through the Rightmost door.
It will take you down into the jungle-ish area and towards Molachev, the
guy to kill for the Unruly Slaves quest.
(Side note: If you're losing Golems you might wanna go ahead and do
Cold One. I don't know if they drop the Ice you need if they die in melee)
It's pretty straightforward, just follow the green arrow, wax his minions,
and then take him out. He's a Ranger, and uses Melandru's Arrows as his
elite. Extra damage and bleeding, nothing too scary. Once he's dead head
back to Krak to collect your reward. Next you should probably do Cold One.
Cold One is as easy as punching yourself in the head.Head back to where
you met Krak, and there should be a path off to the left. Take it. This is where you acquire the Frost Golems by the way. Just lead them further
on to the end of the hall, and there's a forked path with enemies on both
sides. Take them out, use the Frosts as backup to clear the rightmost path
for a ways, and collect the Ore Ingots you find there. Then you won't need
them anymore. Lead the Frost Golems under any crushers you find, and let physics take it's course. Collect 5 Icechunks, double click them, and use them on Warm One. You now have a Cold One. Return it to Krak at your leisure.
By now you should have (or close to having) 10 Ore Ingots, so go talk to
Tharn Stonerift in the first large room you had to clear, and return to Krak.
Now the last 2, Wrenches in the Gears, and Fire in the Hole. The ones this
group really seemed to struggle with. Luckily they managed to live. Here's
a few pointers about how to go about it.
I'll start with Wrenches. Taking this quest will spawn 5 Rebel Spirit Keepers
in the large room. (That's why I said to clear it before taking the quest,
makes things infathomably easier) They're all monks, so they don't pose much
of a direct damage threat, but they are rather fanatical about healing and
resurrecting their losses. Interruption/shutdown is KEY here, because other-
wise, this can go on for hours. Simply focus fire on one, and kill the next.
Interrupt Resurrect when you see it being cast. Pretty easy stuff.
Last off, and arguably hardest; Fire in the Hole. Get the quest from Krak, and
head through the middle door in the large room. Time the crushers, and run
underneath them. Once you get to the end, take out the 2 patrols on the
bridge and hill, and head down and to the right. This brings you to two wood
bridges, and the Flame Djinn on the other side. Get one person, preferrably
someone with a hex or DoT spell and have them step on the bridge a ways.
The Djinn will aggro immediately, and charge towards you. Don't be a hero,
this bastard hits hard. Instead have everyone run to the 3 furnace guardians
nearby and stand literally as close to them as you can. Kite the Djinn over
to them and they will do the rest. Pretty much every hit they have does
knockdown, so the Djinn will be unable to heal or flee. Take him out, and
you're done. Head back to Krak and that's the last of his quests.
Galen's Quest; You need to visit several locations in this quest, and in doing
Kraks in the order specified you visit all of them in doing the mini quests. But
if you are missing one or two just follow the green arrow on the map, you just
need to get the area in your aggro circle and it becomes checked off.
I hope this has helped, and if you have any other questions please feel free
to post them, and I will do my best to answer them.
Regards,
Rosette