wow i could also use this info o.O i keep losing to him........ even with KoR on my side. :/ atleast they're(Ruby also) harder to beat than Sephiroth...... >.<

Well you all probably now you can get rid of the time limit by acquiring the Underwater materia right? There are many ways of doing it, but the most failsafe is the use of three master level marteria of knights of the round, and three master level mimic (thats just me being picky). Just mimic it like usual, but then if you break the chain you can easily cast it about 10 times if all your party members have full mana and have the summon. Another way is using the cats bell to get to 7777 HP which is helpful apart from when it ends and leaves your characters with only 1 hp1 megalixir needed (you can obtain 99 by using the W- Item glitch) but yes defeated him amny times!