@EphiusTD: They are clearly stronger than the MC and Rena. It's just the military would investigate that temple and they might catch up to the plan of summoning the great and powerful PUUUUURSOON. That's troublesome for them.
@Merilirem: Wasn't it that way, that the skeleton is quite careful about his resurrections? As far as I remember he tries to avoid them, as he doesn't now for sure, that they go on limitless. He might get the information edge, if it happens, but it is risky in his eye...holes.
From that perspective I share Acolytus's POV. He needlessly antagonized them. Even a second time, by telling them PUUURRSSSOOOOON won't get his tuna in the end (will lose), even though the first time was so well received by the harpies.