To beat Sephiroth, u have to be at a very high level(i recomend at least lvl 60 in all
difficulty modes with at least all growth abilities to lvl 1 and u need berserk charge or
a weapon with berserk charge like Final crest). It is best if u keep at the same height as
him because of his ground attack(i call it the machine gun slash[gayest name ever]). Use
reflect as much as you can, but only use when sora is on the ground(u can only cast it
once in midair) when ur MP runs out, keep away from sephiroth until he whacks you into the
air, immediately regain balance and start attacking even if sephiroth hasn't come back out
yet, sora will start attacking towards sephiroth and keep on attacking until his MP rage
is done(he will do the finishing move if his MP is back again) Repeat this attack pattern
until he dies(he will teleport away from you while u r attacking him for a period of time,
just let him do his ground attacks and whack him back up into the air then do the thing  i
told you to do). When Sephiroth does "heartless angel" he levitates upwards with
one hand raised and he will also say "heartless angel", when this happens, jump
up, do aerial dodge, glide towards him, then whack him silly before you get the little
halo above your head(i think it's a halo, but u will know because there is also a sound to
it). When Sephiroth does the cool volcanic eruption like beams attack, you should glide
away from him as fast as you can or, if you have enough MP, just get sucked in and keep
doing reflect until it's over. When Sephiroth puts black orbs around you, it's hard to get
away from them, i just keep doing reflect until they hit hit you or do guard or just whack
them away(doing reflect and guard usually gives you less chance of getting hit by
sephiroth.) Finally, when sephiroth goes out of the map(close to the edge of the cliff) he
will send meteors or comets crashing down on to sora, just dodge this by using aerial
dodge and gliding left to right around the map(it is easier to lock on sephiroth so you
know where the comets are coming from).

WARNING: There are no guarantees of winning against sephiroth using these tactics (I just
beat him using these tactics) There is a great chance of winning using this info but it's
because of the player that can really beat it(These are only guidelines, if the player
sucks, he/she will lose, and if the player is good, then there is a chance they might win
using this info.<table class="table_ch"></table>