Ooof, a wall of text incoming!
Important: Don't leave the instance. For tameable Fenryr to spawn, bosses need to be killed in one run through the dungeon. Learned that the hard way.
Hymdall: I went Dire Stable - Dire Frenzy - Posthaste - Bestial Fury - Binding Shot (not needed here) - Murder of Crows - Killer Cobra. Pet: Tenacity-specced turtle. Flask, mastery food, pre-pot & drums at the beginning.
Here it boils down to 2 types of problem: a) Pet dies b) Hunter dies to dragons. Keep up Mend Pet at all times, use Misdirection on CD for damage reduction. If the pet dies, Revive & Feign Death. If Hymdall is too close, Aspect of the Turtle, Revive & Feign. If no matter what you just can not keep the pet up, use Aspect of the Beast talent instead of Killer Cobra. You will just wear him down over time.
Dragons: there is an easy way to deal with dragons. See which dragon will fly first (they will be closest to platform where you are fighting). Stand by that line, the moment lightning starts lifting off from the ground, run to that line. That way you do not have to worry about two other dragons, just the whirlwinds to evade.
Fenryr: First phase is tank & spank. Blow all your cooldowns, pre-pots, drums and burn him down. Second phase is trickier. I could not keep my pet alive with my ilvl no matter what. Even if I aggroed the adds to myself to kite / Binding Shot / Tar Trap them around. Then Fenryr did a quick work of me. I decided not to tank him and kited him around the lake. For that, you have to first clear out all hostile mobs that you might run into during your jog.
I went with Dire Stable - Dire Frenzy - Posthaste - Blink Strikes - Binding Shot - Murder of Crows and Aspect of the Beast, for maximum pet damage on the run. For the pet, I specced my trusty Turtle from Hymdall into Ferocity, for the sake of deeps.
The start of the fight: Stand at the maximum distance from him that your abilities allow. Flask, food, rune, pre-pot, drums. Misdirect @turtle and go all out at him with all cooldowns. The turtle will die in about 15 to 20 seconds and the boss will switch to you.
Use Heart of the Phoenix to instantly resurrect the turtle while running from Fenryr. When he howls, use it to put some distance between you. Drop Tar Traps and Binding shots behind you to slow adds, but otherwise, ignore them and focus on Fenryr.
When he leaps, if you use Disengage when he's already in the air or put enough distance between you by running in straight line, he will miss and not apply the bleed. Only use Disengage for the Leaps, or he will kill you either with bleeds or with catching up. Save the Aspect of the Turtle and Cheetah for those "Oh shit" moments
The Scent of Blood speed boost will help you stay at a healthy distance from the adds. Keep track of them and Fenryr from the corner of your eye, they tend to swim across the lake to cut corners.
If the pet dies (and it will due to aggroing the adds and sometimes over-taunting Fenryr), Revive Pet keep running. Feign Death after Revive Pet if adds and Fenryr are too close, it will give your just enough time to flee
while the wolves will maul your pet
Hope it helps
You can watch the Fenryr kill video here -
https://www.youtube.com/watch?v=dVN8AGarmhM
Grats to everyone who's gotten him! Sure is a neat wolf. IMO he's more interesting than most of the transparent spirit beasts.
but assuming he remains available after this xpac (and no reason to think he wouldn't be) you could just go and get him then.
