Ehll Tou is amazing

[Iscah]

Takes time yes, but it's basically zero effort. Unsync a couple of dungeons that give green rewards, then sell them all to the enclave. Takes a couple of hours to max for the week, then wait til the next week.

You don't even need to do that. Just go to the marketboard and buy all the orchestrion rolls and junk materia that people are selling at or below NPC sale price, then hand them in to be paid back what you've spent plus the bonus. You lose a little through sales tax of course, but certainly better than spending hours grinding dungeons.