A paladin cleared a3s soon after the world first when even the devs weren't expecting it to be cleared that early. Eeep that was me; though honestly I only stuck with PLD because we were so many attempts (600+?) on A3S that changing to DRK and optimizing a DPS and cool down rotation would have taken several days when the DPS was just that tight. I actually ended up doing 650 DPS on our kill, which is around what the DRKs in the other first week (well first week it was cleared) ended at IIRC so the difference wasn't actually that great, but obviously it was enough for us to take longer also considering we didn't use a DRG either.

Basically, if we had thought to switch to DRK/DRG instead of PLD/MNK maybe a week earlier we probably would have done it.

And then I switched to DRK for A4S, because that entire fight is just designed around DRK tanking. =/