User blog comment:KodachiZero/Version 2.8.0 Changelog/@comment-28010705-20160923100417/@comment-28010705-20160923153125

Oh OK!

You're right, fist, rifle and pistol are rare (others are (were???) common for me). When I need to max them, I farm the quests (20 AP with enhancers rewards) from dawning during demon event; moreover, use a team with exp booster: you can kill two birds with one stone! :)