I only really care for demo at this point;
Demo 2-set: Corruption generates twice the amount of Fury and critical hits of Corruption have a 50% chance to spawn a wild imp.
Demo 4-set: Doom now does 50% less damage but ticks 100% more often and your Doom has a 100% chance to critical hit.
I want my army of imps from ToT back, okay! Don't judge!