And what would happen, if he decided to create a barrier like the one in the Northern Crater, or even more powerful than it, to protect himself? Do you think Sin could esily destroy it, before Seph use the Negative Lifestream to blast Sin with an attack with the same power of the Sister Ray(remember that the cannon was using the power of the Lifestream)?
Seriously dude, Sephiroth is not just a guy with a sword.
And you still didn't show me where I insulted you, in that other post.