The skeletons didn't kill each other during the fighting, but would stop just before killing each other, and would mostly only use tactics to disable - however, if any human or animal ever took a dagger to the eye socket, they would perish without enough health, suffering a major critical hit.
Soon, Jay gave them some respite and healed them, restoring their weapons and crafting a new shield for Heavy.
The skeletons, despite being level two and one, were each quickly turning into experienced fighters.