BaneOfSephiroth

When he activates "Heartless Angel" i make sure to press the triangle reaction comand and then use berzerk charge to keep pounding away at him like the strat guide says, but then the guide says he SHOULD put those orb things around me, giving me time to heal. Instead of that he teleports behind me and kills me. I'm on proud difficulty. And the name references FFVII not KH I tried using limit form right after Heartless Angel and using Last Arcanum, but it failed because after I finished the limit he teleports and kills me And I've maxed Valor, Wisdom, Master. My Final is level 5 and I havent found a good place to level my Limit form Also, can anyone tell me a better place to level up my Final form? TWTNW is taking FOREVER

I remember playing the original KH II and beating Sephiroth around level 40. Now during the final mix I'm level 67 and I can't beat him no matter how hard i try. What am I doing wrong?