ok so i rapped this asshole with hax sonic blade (4x), then reflect blade (cloud + keyblade + keyblade), firaga burst (fire + fire + gravity), [strike raid before next sleight to stun him] gifted miracle (bambi + magik + item), repeat sonic blade-firaga burst, and ended it with curaga and arcs arcannan. I finally made this strategy after using blitz in the first fight against him and it took to long.
Sonicblade is a quick 7hits and plus hes slow. Reflectblade is a good card break just make sure he doesnt block it. Use firaga burst when you are close to him. Strikeraid stuns him and allows u time to gifted miracle (or item/cure). It restores all previous cards so repeat the process. Use curaga (make one a 0 encase he wants to sleight you) if you need to or item. Arcs arcannan is a low sleight (between 1-5points), but it attacks hard and 13times if done correctly.
This is my new setup and all i do is sleight the entire game. This works well against Vexen in TT especially since you give him no chance to slieght you. It works on the 11th floor first battle too.