Safer Sephiroth is a pushover.
Tomorrow I'll figure out exactly who would win but right now I can say this:
Ruby and Emerald have a higher tottal HP than Omega and Ultima but Omega and Ultima have more powerfull attacks. Many of Ultima and Omegas attacks would do minor dammage to Ruby but Light Pillar will still do 9999, no matter what, and Terra Break does about 3000-4000 dammage with every hit even if you have maxed defence. Gravia is gravity-based but I think Ruby is immune to gravity... Emerald, however, is not. Megido Flame will always do 9998 to all targets. Ruby Weapons "Ruby Flame" attack is fire-based and would heal Omega. The MP absorbing attacks would be useless since Ultima and Omega don't need or have any MP. Emeralds storm-thing attack would do 0 dammage since Ultima and Omega doesn't have any materia and some of Emeralds most used attacks are gravity-based and would therefore have no effect since both Ultima and Omega are immune to gravity. Emeralds many eyes and Rubys claws is a bonus and would add some extra dammage... but they would fall pretty fast to Gravia, Megido Flame and Terra Break. It's a close call and I will try to figure out the possible outcomes tomorrow... but right now I think Omega and Ultima Weapon would win.
And yes, I love Ruby Weapon... but Ultima Weapon is my life!!! :love: Oh, and Ruby Weapon IS a GIRL! *points at sig*