This is what makes the Lesser Evils cast out the three Prime Evils, Duriel and Andariel... right?
So instead of breaking the pact the Burning Hells and High Heavens made, he decides to honour it and instead start a civil war with Azmodan?
If there was one of the seven evils I expected to break the pact, it would be him. Seems odd to me that he doesn't.
Does anyone know why he did this?