Tor Gul The Defiler definitely is the end game for me..

I can't go pass that boss, it's the worst so far there's no where to maneuver and his fire breathing gets me every time, I understand the Game is hard and challenging but rolling around without laying a hit and getting one shotted it feels like crap, I have no Idea how U guys doing it, do you have to be level 40+ with 50% movement speed, millions of damage and 2000 life and barrier, simply rolling around and trying to fight back doesn't work...