I just maxxed shoot and take aim, basic lead,
hex eater i only maxxed after i mastered simply cuz i didnt wanna do too much damage to the enemy but just drain voodoo to train other weapons, and it comes in handy for instantly draining an enemies voodoo in one shot so i can help my friends level or whatnot.
honestly i never even unlocked any of the ammo types besides hex eater, but probably will play around with the diff types on my other character.
maxxed sharpshooter as without it, daggers are pretty useless imo, got sick of 1 out of every 3 missing, now ive rarely if ever missed, and they become fun, and it works for the pistol acc too obviously so great for those sick of the miss miss miss syndrome..
i dont believe mine is best, cept for me

dont use the pistol much, and id probaly get tired of the specialized ammo types and running out, so i rely on something i know i'll have always, and not a finite amount.