Oooh, did I hate that battle! It's the only FF game I've played that I've never beaten twice. I was 11-12 when I first beat it, so that may be why to do this day I say it's the hardest final boss of all the FF games. Sephiroth and Jenova were easy enough, Kuja/Necron were challenging but easy still, and Jecht was annoying but I got through ok. It took me several tries before I could even get to the third form, which was hard enough. I cheated and used the Kamikaze move, which is an instant killer for a form. Sadly, it is a doube sided sword, because I lose the ability to get another member. It was hell getting though that battle, but I was 11-12 as I said, so maybe I'm more advanced now lol. I may just replay it to fight her again...