How do you beat sephrioph in kingdom hearts 2

i was a level 86 wene i beat him and that's without the cheats i was very lucky u have to have alot of elixiers and u have to move around alot in the begining wene he dose that combo make sure you consintrate and he doesn't hit u cause then ur doomed and wene u get him 2 at leest 1 line he will do metior showers sooo beter keep moving cause its a very powerfull spell but the good thing is the metior atack is alwas horizontal sooo u can get away easier other then that just keep bashing and use reflect and heal urself before ur hp is under half