The debuffs probably do land, just run out too fast. From what I've saw on mini-Garuda (have yet to go into hard mode), Garuda doesn't move as chaotically as Moogles, so our range isn't a problem. And we take less damage if we happen to land on the wrong side of Garuda's attacks. BLMs don't really have an advantage there since the attack hits no matter how far away you are and it's faster to change sides if you're close to her. IDK if the BLMs I was were not giving their best, but I had to slow down a few times because I just kept stealing hate from the WAR.

I do think there will be other setups after her Aerial Blast exploit is patched. (Which should be... today?)