Got 6 Atmas in a few hours last night
I have 3 Scorpion, 2 Maiden and 8 of the others. I only need the Scales and Crab. Basically, my friend and I started farming at about 9 PM from the top of the list and whatever ones we had, we skipped. If one got a drop, the other agreed to move on. He's a smoker, and I'm not, so whenever he stepped out for a cigarette at his place (we were on PS4 chat), I would jump back and go after the one he just got. What's funny is that I got every one of them in that short time. :D To make matters worse, he said, "Just keep running fates, I'm going to microwave some dinner." I got more! So finally at 3 AM, I talk him into running one last fate, and I was so glad when he got the Atma of the Crab. I didn't, but that's cool. I can run them later. Then he says, "How many tomes you got?" Like 344 or something. "Dude! You'll be the only person with all the Atma stones and no way to finish the damned thing!" Let's run Whorleater all weekend! I gotta run Howling Eye HM as a WHM and extreme as a Bard. That should get some. :D
Anyway, 2 to go. No, I can't give you a magic ingredient. Didn't have to be there for every second. Didn't have to kill every mob. There was no synchronization with a Japanese clock... It's pure luck, and I know that I've just been lucky thus far.
*** Of course, I started with a few. ***