We went to this as:
SAM/NIN
THF/NIN
(actually engaged)
BLU/NIN
RDM/DRK
WHM/BLM
BRD/WHM
(stayed in tunnel healing)
All the mages stayed in the tunnel healing. The idea was to have the BLU/NIN step up to the front just in case one of the front liners died (having only 2 front people GREATLY minimizes AoE damage --- also makes Ululation much more managable)
BRD/WHM (me) kited Elementals, WHM got one also and also had to kite. I died, but the RDM and BLU were able to keep healing the front liners while the WHM also had to kite. The Elementals Vanished and our WHM was able to return to the fray. I kept up Storm Fife Ballads and Marches.
Also with Double CHR Etudes, I was able to land Elegy relatively well. I did not use Troubador or Nightingale for its duration. We won with me being the only death; our RDM/DRK Chain stunned at 20% or so, and our SAM 2 Houred to finish it off. Very clean with this set up (we went 1/1 after moving our BLU to the back to not aggro Elementals).