Having recently getting into Atma and now working on Novus, over a course of about 8 Days, I can say the drop rates of the Atmas are ok as is however they should add an alternative Non - RNG method to obtain them.

Allow the players to be rewarded the Atma after a certain amount of Fates are completed in a given Area, 100 seems like a fair number there.

You keep the grind and yet remove the "endless" RNG based method players hate.

win-win