Instance: Utgarde Keep
Box: 4x Elemental shaman (Individual warrior tank)
Gear level: Pre-heroic blues/70 epics, tank with level 80 blues.
Difficulty: easy
Guide:
Trash till first boss:
They are all fairly easy apart from the drakes, they did not hit hard on the tank and I did not need to use hex for this part either. We just steamrolled and tank+spank our way through. On the drakes I had to keep healing the warrior a lot, even did some overhealing, as at times they seemed to ravage the tank. Also you must make sure you aren't anywhere near the drakes yourself, only the tank in its range. While keeping the health on the tank up. Doing this, it is quite doable, my tank died once but the drake died shortly after that.

Prince Keleseth:
This boss will spawn adds from the door opening on the right side of the room. On the pull, I position myself quickly on the left side of the room while having the warrior tank him between me and the door where the adds spawn. Grounding Totems seem to have no effect on his shadowbolts so keep your tank and everyone up as high as possible as he can sometimes do quite a lot of burst dps, that boss. I popped four fire elementals early on, which seemed to handle the adds greatly. Nuking the boss with lightning bolts only, in my current gear I run oom quite fast and in the end lb spam seems most mana conservative. I was prepared to drop a mana potion as well, but we got him down with me on 10% mana left.

Trash leading up to second boss:
This is all easy trash, I tend to kill casters first, specifically the ones that throw shields on people. But often switch dps. If there are wolves I instagib the wolves first. The non elite overseer packs are easily handled with 4x Thunderstorm and 4x Fire Nova Totems. On packs with four mobs I pulled with a single hex, as my tank was sufficient in tanking three, I did not bother with more then one hex.

Skarvald & Dalron
This fight is a bit tricky. There is a lot of hp to burst down. However grounding totems to their job like a charm. They nearly negate all of the caster boss' dps if you drop them the instant the cooldowns are ready again. I found it was easier to just nuke the caster first, then switch to the melee boss. Also, I stayed at max range. The melee bosss does charge then, but this wasn't a problem for me. Grounding totem spam, Lightning Bolt dps and Lesser Healing Wave for healing. I must add though that I needed to use a Runic Mana Potion this fight as I ran out of mana when the melee boss was on 30%

Trash leading to End boss:
The only extra thing here is the drakerider. Kill the rider on top first, then the drake itself. Seemed to be best.

Ingvar the Plunderer:
This boss is quite hard, but you can avoid a lot of his dps. I however had a tank with me who couldn't see the boss' casting bar. So I wiped here the first time, and nearly the second time too. But here's the tactic that should make it easy with a tank. When he uses Smash in phase one, or Dark Smash in phase two, the tank should immidiatly run through the boss to behind the boss to avoid this skill. Also when he does Sundering Roar, stop casting. I just tend to jump myself. If you do those two things right, it's fairly tank and spank and pretty easy. In my case the warrior died in phase two due to Dark Smash however, I started nuking like mad, and got the boss down just before dying on all four myself. Had to ankh to loot. But the tank shouldn't have died there to be honest.