I will talk about a 2 tanks strategy, a single tank strategy is possible and has some differences.

P1

1) Stupid question. MT, OT, Melee, Ranged or Healer ? In our strategy, the OT engages, the MT gets Twintania and position himself "not far" from the hole on the right. The OT tanks the adds on the opposite side, the melees are close, the bard is almost at the exit and the BLM is close of the entrance. One healer is in the middle-left and one in the middle-right.
2) Stupid question. MT, OT, Melee, Ranged or Healer ? The Ranged, the MT and Healers will be far from the OT, the Melees will stick with the OT.
Bonus : 85% if Twin isn't casting a sentence.