So, is the chance to resist based on the hammers quality?
Or is it the damage dealt?
Or static?
And if it's number 2, only the damage percentage of the hammer or the total?
Theoretically, you could hit twice with bladed gloves (or any other, or without them), then switch to pneumatic, combo hit, 2 more hits, and open the next round with a heavy punch, that is also a combo attack and activates the pneumatic hammer. Not sure if that even stacks.