Possible Alternative to current Atma?

[Keoeson]

But the current state of RNG for Atma is very atrocious, 30 hrs spent to show for 1 atma stone whereas my FC mates come in 3-5 HR's and get 11/12 or even 12/12. It's not a very balanced system considering.

The SE RNG is weird, but these massive differences in drop rates shouldn't be possible even with this. It can't be coincidence and there must be some kind of system behind it.
It's more likely that each atma can have a different drop rate and nobody has figured out the system behind it yet. I think that all players that farm for atmas in just one area for hours are doing it wrong. So the best option for now seems to be to change areas frequently.