Dark knight: Am I failing or what!?

..Unfortunatly I don't have that kind of money to be blowing up I might if chaos scrolls inflate after that patch though

Thanks for the advice though..

If you could 2-hit with Zerk, that'd make it easier even with 19. That'd help you avoid getting hit and you wouldn't be in the danger zone so often. Maybe upgrade your gear a little bit to 2-hit, then go for zerk30.