Aeacus i beg to differ here.
based on my experience fusion brings the whole damage level up,
example. 20-40 normally, on level 11 fusion would do 30-50.
Im still not 100% sure, i just think that's how it's supposed to be.
Well, the only way kvkop84
's min dmg did not increase after upgrading his weapon is when power level only applies on the max dmg.
failed to mention if his opponent did use some resistance and/or shield that lowers weapon's dealt dmg.