A good party, you can start those from 41 (but you'll need a nin tank and a bard as they'll rock the PLD).
42 onwards is when my pt would have been able to fight these but we started at 43, and we have the unconventional setup of PLD SMN SCH. a good party starts 41, everyone else 43. Do not bring more than 2 melees + 1 tank to poke the coeurls or you'll be eating dirt from charged whisker spam.
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