» Thu Dec 08, 2011 12:27 pm
I ran straight for it and picked up the soul gems that shoot the fire.
Alternatively, go outside from the whole place, take up the atronarch standing stone and you'll absorb half of the fire. Alternatively, you can do perilytes quest and get his shield. From how I've understood it, blocking with it will summon a magical wall in front of you that protects you against magical attacks.
Or just turn down the difficulty.
Become ethereal also works, as well as the whirlwind shout as Gneilson said.