Tonberry's got it rough, then - on Cerberus, there's always at least two T9 kill group/farming parties on PF in the evenings. I myself am helping some FC mates get through it right now as they want a chance to get loot from T10 and T11 before Heavensward.

But no, DF is definitely not the way to go for T9. I still consider it the most mechanically complex fight in the game, FCoB included. It is a shame that so few farm it, but I really wouldn't trust anyone outside of my static with doing it right over and over. I know it's been said, but the only way I can think of getting this done is getting in some big linkshells with serious players and just asking around.