Quote Originally Posted by Giga Guess
Here's how I did it. Two characters with Master Summon (Yeah, I'm a sucker for punishment...), and one designated healer (W-Item may help on him/her). I had only one W-Summon, so I had Cloud W-Summon Hades/KoTR, or KoTRx2 if he's still paralysed, and the other cast Hades or KoTR as needed. Have the item master use a Megalixer, or attack, if you so desire. Battle ended in fairly short time.
You mastered KotR and didn't master W-Summon? Heh

You shouldn't need to use W-Item for this battle. W-Summon, Hades, KotR, and Mime are really all you need. Well, Revive-All(or Phoenix, though that uses more MP), to revive the two characters you killed before the battle. After that, it's pretty straight forward.

Or, just use dazers to paralyze Ruby, as one person suggested. W-Item would help to use two items at once(could paralyze and heal in same turn), but you don't need to use the glitch with it. Then, just W-Summon KotR and then mime it. Shouldn't be too hard.