I beat Ruby by nuking Ultima over and over with Quadra magic, HP and MP absorb. Had to have Pheonix ready also with Final attack. I used KOTR once on Emerald, but it did like, not even 10k. Didn't use Underwater materia, so I usually died when the timer went out. Omnislash + Highwind + 9999 because of Vincent's insane kills == love.

I don't rememeber what else I had equipped, however.