SNITCH. SNITCH helps so much!!! Especially during the "points" round... you have to go through 10 levels without losing all your points, and in Proud mode, this is ridiculously hard -_- Snitch keeps your MP up so you can keep Gravija-ing their asses and stuns them when you need to go attack. He also goo-guns enemy attacks =) If you have summon boost, Snitch will stay with you for ages.

Plus, Snitch is fun to watch =)

Oh, and for level 49, I found an easier way to beat Squall, Tifa, Cloud and Yuffie. They tend to cluster together in the middle a lot. You should have maxed out all your Drive Form abilities (glide, jump, etc) by then so this should be easy. Fly around the area in circles to avoid them while you're recovering MP/low on HP (Beware of Cloud, who will also run around in circles and attempt to hit you... but there is a pattern to this and it's quite easy to dodge). Once your MP is full again, go back to the center where they are clustered and clast Reflega to NO END. All of them end up pwning themselves this way, and it is SOOOOOO satisfying to watch. If you have an open shot, feel free to smash away at them, but remember, in Proud mode, none of your enemies EVER wait for you to finish an attack before they go after you, so you might get pwned from the back.