Bursting on a stun is an enormous waste.
Stun status gives an innate chance to multi-attack, you never burst when they're stunned. You use your skill and try to get as many multis in as possible. You do considerably more damage with even 2 "normal" attacks, let alone 3-4.
Edit: Oh, I see. When I said "burst damage" earlier I didn't mean actual capital B Burst, I mean instant damage like in everywhere else that's not this game.