Yu Yevon is pathetic.
I can't see why anyone should dtruggle on him.
You can just turn him to Zombie and use Pheonix Down
or cast reflect on him and he will Curaga you and all he does
is use Demi and Osmose.

But, with Braska's Final Aeon.
Just turn him to Zombie and Curaga him to death (If you really suck.)

And what did that post have to do with the scene in the last battle?!?