All you really need is Break Damage Limit. and maybe piercing if you're paranoid.

You ought to have sets of weapons.

a capturing set, with capture and break damage limit (just need three, and only one with break damage limit)

an AP gaining set, with triple AP, Triple Overdrive, Overdrive -> AP (seven of these, but you can win them, or something good enough)

an actual fighting set. the celestial weapons are good enough, but else you really just need break damage limit. I think my Tidus' Excalibur still has three blank slots.