Originally posted by Zep Tepi:

I do not see a mace, sledge or stagbreaker in your list of preparations. Bonemass is resistant to everything except blunt, and the adds are vulnerable to that also. Flatten and clear the area. Put down a few campfires so it stays clear. Chug the poison resist mead and play a slow game of ring around the skull.

Like seriously, why a sword AND an axe.

Also, build a portal or a small shed on one of those indestructible trees.