Back to using STR on all ranged ws, for those that don't know:
The upper cap of fSTR2 is ΔSTR = (14 + Weapon Rank x2) x2
ΔSTR being the difference of mob's VIT vs. your STR
weapon rank is floor(Weapon Damage / 9)
anni+achi bullet is a weapon rank of 39
upper cap of fSTR2 for anni/achi = 184 ΔSTR
So you need 184 more STR than the mob's VIT. Please correct if I messed up.
This also works on any ranged damage so if you're capped accuracy str can become more valuable than ranged attack, it also makes stacking STR effective on barrage.