Ok, lets say the system would be something like this:
- weapon type is what dictates raw energy of the projectile shot (raw damage, if you will)
- projectile type is what transforms that raw energy into actual damage and armor penetration
For example:
- broadhead bolt would have 1.25 damage multiplier and 0.00 AP bonus
- AP bolt would have 1.00 damage multiplier and 0.5 AP bonus
This way no matter what weapon those bolts are fired from, AP bolt deals 25% LESS damage than broadhead vs unarmored targets, but vs armored targets it has up to 25% MORE effective damage to pierce the armor.
Seems pretty simple…?