Originally posted by Eilios:

So, I've started bonemass but after like 20 minutes i made half way and wentback home for soem repair of my weapons, while i was doing that bonemass healed and keep throwing multiplies enemies on full hp. Any ideas or maybe if somebody wants to help me kill it?

You do not need help with this boss. Get a level 1+ iron mace (your best food, and a poison mead obv.), walk up to him and hit him. When he winds up an attack, walk away then go back in. Rinse repeat. He will be dead in a few minutes.