Before I battle I usually do the W-Item trick to get an ass load of Hero Drinks to boost all my stats. I also have all characters in hyper since normal attacks really are not going to be helping matters.

I must admit the easist win is when I got Cait Siths ULTIMATE limit against Emerald...the instant win one. Death dwarfed Emerald Weapon. Let me tell you this; it was awesome.

My Ruby weapon trick is that Hades freezes Ruby weapon and since you W-Summon with KOTR it hits him so fast that he is still frozen and thus does not counter attack with Ultima.