I know nothing of this calculation. When i played Siptah with @MarcosC he explained me what biles do but still never used them, call me traditional, i give my trust to master weapon fittings. Of course there are weapons who need only the dmg bag or the armor pen kit, but i hardly use these weapons. One member that created dmg mods and can surely help here is @Xevyr, he can tell you exactly the difference in numbers. I would surely wanted to know too even if i wont use them ever .