KH1 Sephiroth took me to the cleaners many times, till I finally beat him around level 70-something. As for KH2... I haven't bothered completing the game itself yet - that final fight got frustrating and apparently it's wise to learn a bunch of Drive abilities first, which I never bothered with while actually playing through the game.

So I took on KH2 Sephiroth at level 50-ish, and lasted less than 10 seconds. I wasn't expecting to win anyway, but it was still some pretty swift carnage.

What kind of abilities and tactics do you recommend for that fight? I'm currently wasting time by Drive-grinding to get more abilities, but I'd rather do that as little as is necessary to achieve a comfortable victory, either in the final battle or against Sephiroth.