Atma farming is an absolutely terrible, lazy, and enraging mechanic. The developers of this game should be ashamed of themselves.
I've been hard at work farming Atmas since the patch went live. I have 4. I've farmed for a minimum of 1.5hrs and usually 3, six days a week. The other day I had the extreme displeasure of watching a gentleman on my friends list complete his farming in a single day. 6hrs 9mins and he was totally done. Total BS. RNG screws over some of us who work and work for it, others walk up and oneshot this thing.
In the future, I'd suggest making it something simple, easy, and obtainable by everyone, with the same amount of work.
For example: Score 500 points in FATEs in this zone.
Gold = 5 pts
Silver = 3 pts
Bronze = 2 pts
Failure = 1 pt
If you even tried, you get something. A system totally dependent on RNG to produce a 1% drop rate is absolutely absurd.
I, for one, am done with this game. I can't be the only one. I hope SE learns from this mistake.