If you have a high magic stat, a few Master Magic or Level 2/Mastered Comet Materia, Quadra Magic and W-Magic, link Comet2 to Quadra Magic, and have W-Magic. Link extra Comet2 to HP Absorb, MP Absorb (optional) and Added Cut. The result will be 40 hits for 9,999 damaged, which Mimed twice can even kill the Weapons.