I just finished this up... we had me (59PUP) 75PLD, 75BRD, 75WHM, 75DRK and 75SMN. This was incredibly easy. Occasionally the DRK would take hate (they knew how to play DRK, and used every spell in their arsenal), but he was the only one I ever saw dip into the yellow. Nutcracker did a superb job as BLM along side the SMN, and...
IT was actually very easy with a bunch of 75s. Looks more like it would be aimed toward a full party of 55-60s, or even soloable by PUP post-60 (I'm thinking 70-75).