Quote Originally Posted by G SpOtZ
Quote Originally Posted by DMKA
Quote Originally Posted by kikimm
I completely agree with this. I didn't have either KOTR or Omnislash, and he was still a piece of cake. Don't stress over him.
Yeah, but it's not the same for every game. Doing stuff earlier on determines his stats. I've fought him where it just took omnislash to kill him and other times where I was fighting him for almost an hour without him dying using Omnislash and KotR.

So there's really no way to tell.
the only way you can't kill sephiroth with both omnislash and kotr is if you used kotr on jenova synthesis and bizarro sephiroth because it gives safer sephiroth extra hp. and also if you didn't take down sephy's wall spell.
Umm no. I've seen from playing that it changes. I have no idea how though, and the reason I say no is because I've only beat the game once having KotR.