I wouldn't say no problem, but he's doable.

Affliction lock. Half Kara epics, half instance blues. He punts whoever has threat, which resets the threat level, so you can't just sic your VW or Felguard on him and health funnel. I used my imp for the buff and had him go into firebolt turret mode. Fully Dotted him up, and drain life spammed him to death. Had to use a healthstone and health potion, but he went down.