LoL yeah, there aren't any where good enough to "farm", as in repeatedly run around in a circle killing stuff for drops all day long, anymore.
Realistically, you can "farm" with a thf in Omen, target the fungars in Abby for mushrooms, the saplings in the past for lettuce. However, they aren't really worth it compare to just doing 2 Odyssey runs for gil or just open chests or just do as much ambu as possible.
Ambu is this exact route of a grind, if you can clear any volume one difficulty with a cyclical ease.
Ambu cycles were the closest feeling of merit-po 75 days Ive come across in a long while. Can spam that ***plenty.
OG grind for Gil/levels, now is ambu/cp.
Long story short for the OP. 2 mil a week's with acco/sparks conversions, and grab as much ambu as you can each month as per your performable job spread allows.
Obviously DI/Omen/Vagary/Odyssey/etc. Anything else that your play time allows.
The real money maker through all the history of this game has been in hitting the latest content as much as a player can.