Im seriously at a loss here. Ive been stuck on the boss for 3 hours. Let me tell you about my sorc:
Jullianosx5 magicka divines
Archmagex3 magicka divines
willpower arcane spell power

100 points in bastion, etc. (they're in the right spots for a sorc)

My issue is too much damage at once. I understand to avoid the flower poison things and i stay away from the behemoth but no matter what as soon as the mages spawn I instantly die even if my shields are up. My shields get burnt down and then before I can even weapon swap to recast shields im already dead from a single 20k+ attack after being rained on with other attacks. Its just ridiculous, how am I supposed to handle this amount of damage all at once? Sometimes I can get through but maybe one time I got the boss to 50%. Mostly I end up casting wards until im out of magicka. ITs relentless. Like I said, im at a loss. I dont know what else to do and am going insane. Im working hard for this and need some advice. Ive watched videos and whatnot but honestly when I try to do the same thing its just not ending up anywhere as lucky as others.