Comp: "the dream team"
Tanks: DRK + WAR
Heals: WHM + SCH
DPS: DRG (myself), NIN, BLM, BRD

Progress: A4S cleared.

I'm a MNK main that swapped to DRG for the sake of raid progress. I value early clears, and although I put myself 5 weeks behind in terms of esoterics (i200 weapon + chest piece for monk) it was still beneficial to swap. Although when I get another gobdip through A4S pages I plan to upgrade MNK weapon, so I'd probably be allowed to switch back and forth. At this point, like others have mentioned, gear can make up a lot of the difference in group comps. If people are playing well, it should be no problem.