I usually have BHPL, Ribbon, Auto-Phoenix and either HP+30% or Auto-Haste depending on how bothered I can be to get high HP (I aim for 99,999).

When I go for the final battles, I'll switch it to something without Auto-Phoenix, possible Auto-Regen since you get Auto-Phoenix automatically in those battles...

I typically use the Celestial Weapons, but Tidus' Sigil is proving to be very hard for me to win in my current game...