Well.. On Kael I use fire elementals to max out damage.. So once I get into the air he drops to like, 5-10% when I land..
I just fly arround during the air phase :P Healing with chainheal.

You talk about AoE? I didnt even notice.. I guess I killed the mobs to fast

I wiped once on the "Mana" boss.. But then I decided to use Fire Elementals on him to kill the adds he spawns, and then he went down quite fast
First boss was a joke.. Same with Priestess (Used Earth Elementals here to only get a few of the adds on me).

Was quite easy