Atma drop rate possible analysis/question

[LunarEmerald]

I highly doubt there's some secret the devs are hiding as to the mechanics of the drops. This isn't FFXI, where you're told nothing and are expected to be okay with that.

My experience tells me that there is some kind of anti farming mechanism. You are more likely to get a drop within a few fates than spending hours grinding. I think leaving a zone if you aren't getting anything and trying elsewhere or doing something else and return is the best way.