I feel like I am doing something wrong, but often times during battle with mobs with large hit pools (ie dungeon bosses) i run OOM. I do chaos bolt as often as possible and keep incenerate up and immolate as filler, conflag on cooldown. (plus the artifact Dimension Rift).
So...am I missing something? Is there a drain man? I could LT / drain life. Is this what we are supposed to do? I did a dungeon for example, and each boss encounter, everyone else was fine and I was OOM at the end.