Let's say you are the ultimate creation, Nemesis, fighting a party of characters who haven't gone anywhere near the sphere grid.

Which character would you annihilate first? The fun thing is, (well, I think it's fun ) the party can't use ANY phoenix downs. That character is dead. They are no longer in the story. In a nutshell, which character do you think is the most invaluable to the story and as a fighter?