Before giving your opinion, read this:
Sephiroth's powers:
- Transform parts of his body in giant Jenova monsters
- Regeneration
- Create objects(including weapons) and living beings(the three brothers and the Shadow Creepers, for example)
- Have at least the same speed of Chaos Vincent and Omega Weiss
- Can turn intangible
- Can create illusions
- Can read minds
- A mental power so great, that he can hold back a magic spell with power enough to destroy everything on the planet in seconds, while immobilizing 8 strong warriors in the air crushing their bodies.
- He an create an insanely powerful barrier to protect himself(the one in the Northern Crater is a good example)
- Can kill an entire planet and move it across the universe as a ”space-ship”
- Have physical strength to cut buildings in half, easily
- Can use Iakiri(the blue “line” that cut the Junon Cannon)
- Incredible damage soak(Genesis’ fire did nothing to him) and probably is bullet proof(Empowered Hojo/Weiss was bullet proof, and there is nothing above Sephiroth in FFVII)
- Don’t need to breath, sleep, or eat
- Can shapeshift
- Powerful magic, like: Pale Horse, Deen, DeBarrier, DeSpell, Demi3, Break, Wall, Shadow Flare, Super Nova, etc.
Some of this abilities belong to Jenova, but Sephiroth's body in AC is Jenova.