I'd recommend using a shield and 'macking them in the face quickly. If you're at the point of going for Bonemass you should be able to get yourself a decent banded shield, it's only 20 iron to get it maxxed out.

If you want to be uber safe, you can dig a hole that Neck can't get out of, kick/push a fair few of them in there and train up your blocking. If you get it to 40, with a maxxed iron shield, you should fully block their attack.

Edit: Unless they're higher than level 0, that is. Not sure if I've ever noticed one higher than level 0 though, certainly never had one break my block to the point I take huge damage that I can remember.