you should block or use protect more protect is the most broken spell in kh2 since its just block but with a bigger hitbox, can be activated at any time, and can be activated in the air using protect when he tries and stab you or slice you will result in him taking damage and you being able to spam triangle to get as many jumps as possible and not rely on mickey to beat xaldin this lets you beat xaldin quickly and not needing donald and goofy to much unless you wanna do a limit combo also when he goes into his desperation move and under the bridge to to the middle until the snake arm starts moving and go to the opposite corner since weird hitboxes wont be able to hit you there lastly for maximum survivability equip ethers on yourself and mega potions/megalixers on donald and goofy allowing you to top yourself on mp and staying alive EXTRA if you know how genie works you can also use him to do some broken summon combos