Final Attack + Revive/Phoenix; because surviving is good.
Knights of the Round + Steal as Well; for 13 steals in a row on all enemies, yay!
ChocoMog/Odin + Added Effect (in weapon); instant Stop or Death is neat.
Time + Added Effect (in armor); I could swear it makes you immune to Haste.
Sneak Attack + Steal (Mug) with Mega-All; to instantly destroy random encounters.