Most FFs have a luck stat, and I understand MMORPGs are meant to be consuming, but as a fun way to nerf the atma quest without actually nerfing it would be by implementing a luck stat.
As usual, in FF it is difficult to increase your luck. Make it doubly so here, and make the luck gains miniscule, but just enough to make an impact. Unlike other stats, luck will affect your character in total, not just that class. Each luck point can increase rare drop rate by .005 percent or whatever, or some other formula. To acquire luck you can eat food, drink potions, wear the right gear, etc. other interesting ways to acquire luck can be through unlocking achievements
Things luck can affect:
Rare drop rate
Chance to get double Gil from any enemy
Retainer ventures bringing back HQ items/rare items
HQ gathering rate
Crafting
Transmutation
A lot of people will be screaming about how broken it is, but remember, it can be made purposely hard to increase luck, and the bonus can be tiny but still effective enough to help those that worked for it.
I think also luck should be gained primarily from achievements. Every achievement point we get is one luck. Each luck is .005% chance extra for that drop rate or whatever it is (changes depending on what it is, whether it be crafting, gathering, atma farming, etc). That means every time you get an achievement for 5 points, you get .025% chance. In the long run this will be very helpful. Now apply gear which can be obtained via GC: another 50-100 points. .25-.5% chance. With 300 achievement points, 100 from gear, you have 400 points. That's an entire 2% chance which is HUGE now eat food which can increase your luck by 20%. You just got an extra 80 points. Pop that potion and hope for the best and voila. Now add materia for another 30-50 points and YEAH! Add a party buff for 10% luck and farming in parties just became relevant. Give Chocobos a luck enchantment, or something like that, even better.
Perhaps we could even use GC seals to get a special luck reallocation sort of thing, where for one hour you can sacrifice your allocated points and put them into luck. Not to mention a rank 9 free company boost getting a luck increasing thing.
The following was proposed later in the thread:
This is absolutely brilliant, much better than my idea.
Another brilliant idea: