Board Thread:Questions and Answers/@comment-6354779-20130211103522/@comment-1837917-20130211110127

Get him to eat lots of Large Barrel Bombs. :D And, as a bow user, aim for the uvula, which you should have plenty of time to hit when he's snarfed some bombs.

If there are any specific difficulties, it would help me help you if you could list them. Nibelsnarf can be a pain in the arse, but he can also be a cakewalk. :) I'll try bowing him myself later.