There is one fast way to beat Ruby. First get W-Summon then get Hades and Knights of the Round. Then start the fight with Ruby with one character alive. Cast W-Summon with Hades and Knights of the Round. (Ruby will be stunned and not counter with Ultima) However, the Hades effect does not stack up, so next turn use Knights twice. Use tubro ether or elixer. Then repeat. Using this i cut an hours battle to 15 mins. *NOTE I had fast characters*