How about keep the current system and add
1 fate in 1 region per day (the first fate you complete on a given day in one of the atma regions)
Once you have 7 daily fates in a single region you get the atma for that region

12 atma @ 7 days each = 84 days or about 3 months

Knowing that you can still grind them for small drop rates like right now if you want to