Sorcerer Diablo strategy Nightmare

[Zeb]

The 2nd seal boss wasn't all that hard for me. Just use golem and then spam lightning or hydra. When your golem is about to die just summon a new one and the 2nd boss will start hitting the new golem. You'll want to pull him away from his mob or kill them off first though otherwise your golem might die to fast or some of the will go for you instead of him.