Tell your BRDs to gear up properly (or stop sucking), if they have not been 1shotting plumes with rain of death, it means they need better gear and no that doesn't mean Darklight gears.

Also bring a DRG, WAR isn't really optimal imo these days for Garuda.

Post patch, we always go with PLD DRG MNK BLM 2BRD 2WHM(or replace 1WHM with a BLM), never really have issue, if you decide to bring 2 WHM, assign 1 WHM to help on nuking Chirada when it pops in case you have terrible MNK that miss combos bc direction can get messy during that time.