Garuda has never been forgiving, even in her Trial-size battle. I tried fighting her back in Normal back in 1.0... no matter how hard we tried we could not not wipe when she did her 'wipe the field' move, the stones would take too much damage beforehand. And yes, that was with us killing the plumes. I don't see her being any different now (haven't gotten that far yet, still working up to Trial-size Titan).