To "The Crystal"

First, I haven't played VII in a while, but wasn't Jenova basically crippled when Sephiroth dominated it? If thats the case, its not really much of an accomplishment. Its not better then stabbing a guy in a coma and going "I owned you!"

Second, he did hold back Holy and summon meteor. Meteor, however, failed. You get this game leading up to sephiroths aquisition of Meteor, and it fails.

Third, I don't really think Weapon was part of Sephiroths plan. Sure, it caused Chaos in the outside world, but what did that really do for him?

The big thing is, While Sephiroth did alot, none of it was spectacular, and the only 2 things he did that were worth much was holding off Holy, and achiving the black Materia.

Compare that to Kefka, whose plans succeeded time and time again, until his last one to destroy the world.

So Sephiroth tried to accomplish things, but in the end failed at most of them.