I don't think anyone here completely understood the situation.
Prep: lvl 3 bronze armor, root helm, lvl 3 iron mace w/ bronze shield, poison resist potion, yada yada... My problem is that an abomination spawned in the middle of my solo fight with Bonemass, they ended up stacking on top of each other. It's not possible to kite only 1 of them away. If I stand and fight, I would be stamina starved to my death.

I did a /killall and respawned BM and beat him fair and square.