Did Ifrit in 8mins with 2 blm (one not fully unlocked) 2 whm (one not fully unlocked) mnk war brd drg. Its not hard kill all the nails and Hellfire isn't a problem. Regen/stoneskin help mnk deal with seer dmg so it can pump out much more damage brd using ballad should be able to keep fist of wind on the entire fight.
Edit: Blm can put out much more damage then thm now because it can use freeze to lower enmity and has convert + bard so mp shouldn't be in issue.