What level are you at? What equipment does Sora have equipped? That will make a difference. I got trounced so many times, and then put on some Lightning protection and spanked his sexy, little booty. Guard and Dodge Roll are your prrreciousss. Counter, MP Rage, Combo Plus x2, Air Combo Plus x2 and don't bother with the Special Attacks (Ars Arcanum, Ragnarok, Sonic Blade, Aerial Raid etc.) they consume a ton of MP and aren't needed to beat the game.