Guys seriously, you're making it too hard again.

Step one: Put on frost resist gear

Step two: Stand and nuke

Step three: profit


No really, it IS that easy. I don't even bother with moving to avoid boulders, or get behind boulders, whatever "#$% the boulders - just aoe heal after them. When he runs away to a forge, use IWT to run everyone to him, and continue nuking. Aoe heal every now and then, spot heal if necessary, and grats you.

This guy has the best dieing quote IN THE GAME by the way!!