By Leviathan.Comeatmebro 2012-12-24 23:25:28
I do omega with MNK MNK WHM and an outside Daur99 BRD that buffs before we enter(to make best use of soap). It's dead in less than 5 minutes, though MNK is hard to replace(formless for first 25%). I'd say that you should have very little problem with MNK MNK WHM BRD if you have a daurgjall brd, may want to add a COR if not to allow for a bit more MP recovery and damage(it seems to have noticably high evasion and defense). Presumably, you could chip away at the first 25% with requiescat or use a twilight scythe DRK.
To my understanding, best bet for ultima is slow damage and an aegis/ochain PLD, around 6 people, though I haven't had any reason to farm it yet.