I remember reading in one of the well done guides around the internetz that due to recent updates and balances to skill trees and stats that my old fav from my jp pso2 days is supposedly endgame viable now? I know this only applies to the JP version atm since we are what...an episode behind JP?

My guess is that the viability comes from keeping Perfect Keeper active, while abusing Aerial Advance as much as possible, and even sprinkling in some Chain Trigger here and there since main class JB can move around quite a lot?