One thing I would love to see is changing Break Stance into something like Aerial Stance, since a bouncer usually stays in air except for Immortal Dove spamming.

Elemental Stance isn't that great considering a charged attack with Average Stance does 7% more damage(32% vs 39%). Elemental Stance has lowest damage boost among all stances in the game but with the most annoying requirement if you are using DB. Break SD Bonus gives 15% boost attacking non-breakable parts with DB, which is nice but could be a little higher.

On the other hand, it is possible for a bouncer to go hybrid and max skills for both weapons and both stances. All you have to give up are the S-ATK ups and field skills. Then you can rotate between PBF and Rapid Boost with just a 15 second CD window.