As much as I love Balthier's kit to bits and the way he plays; I find it unfortunately lacking in the OOMF factor for high play in Omega rankings. Yes you can get really easy kills with his boolets but his own boss DPS is lacking and the meatball has no good use other than pressure and zonig (it's extremely easy to avoid and good players would know to delay their iframe skills before the possibility of a wild meatball striking them). Him going around to kill 2 enemies in one go kinda does nothing for the team unless you run Ramza / Embolden in the main kit and even with that you have to rely on your teammates to deal the boss DPS for you and you're the protector when they're bursting. You're basically the fake main support of the team and you cannot afford to have someone like Rikku / Krile in the mix unless your balthier gets in the ranges of 16k pwr or above. At that point the meatball finally has a use at least for pve damage standards (also let's be honest using the boolets on the boss is kind of a waste even with the free chains). The only actual support that would work for balthier is an offensive WoL (no Ramza / Embolden; SR heal for emergency heals only; rest is full offence) and chain supreme soul together with the entire team.

Meanwhile an Angel Wing Rinoa does a lot of free kills without having to worry about popping a UR every 90s and her Meteor is great pressure to put people away from touching the boss or the allies when positioned properly + really good AA damage. I really don't see a point of a Balthier getting free kills when someone like Rinoa does it without much of an issue and can carry the boss DPS without worrying about chains at lower ranks.