Soloing

[Hiragawa]

Attempted Garuda EX, failed 3 times. I couldn't get the adds dead before the check, as they become near invincible once they get close to 'Ruda. I got Sapurna down to about 15% and Chirada a bit less. I think you could do this if you had high burst to destroy the adds before they reach her but it would be difficult.

Just ignore the adds. First set of adds, just keep them all away from the rocks, and destroy feathers. Second set of adds, just run around the arena in circles not attacking. When Garuda and her adds port away, spin around and kill the Spiny to give yourself the bubble.

EDIT: Oh, and I should probably mention that you still want to stand behind the rocks when she does her big attack that wipes them out. She's actually pretty easy when you realize you can just ignore the sisters and wait 'em out.

[Rongway]

EDIT: Oh, and I should probably mention that you still want to stand behind the rocks when she does her big attack that wipes them out.

Hiding behind rocks never has an effect on Aerial Blast, on any difficulty. It's based entirely on how many rocks survive to that point.