In regular PnP AD&D skeletons enjoy a 50% immunity to slashing, and piercing damage is always a bse of 1. Just 1. I remember poking at greater skeletons with a rapier in Ravenloft forever before figuring out I was doing a mere 1+Str damage with each hit. Then I switched to punching with my basket hilts, for at least a 1d3 base damage. Was that ever annoying.