Well, as Despotus said, he'd have Beowulf's Magic Sword skill set to accompany Orlandu's abilities. It's also possible that he could have:

Destroy Sword abilities (Arc Knight Zalbag): Speed Ruin, Power Ruin, Magic Ruin, Mind Ruin.

-I like this idea, since Zalbag was Balbanes' son.

Limit abilities (Soldier Cloud): Braver, Cross-slash, Blade Beam, Climhazzard, Meteorain, Finish Touch, Omnislash, Cherry Blossom

-I find this unlikely because Cloud is not from Ivalice, but the Limits are unlocked by the Materia Blade, a sword.

Draw Out abilities (Samurai/Arc Knight Elmdor): Aura, Koutetsu, Bizen Boat, Murasame, Heaven's Cloud, Kiyomori, Muramasa, Kikuichimonji, Masamune, Chirijiraden

-Maybe.

I also like the idea of Balbanes having Ramza's specialized Squire abilities, although you should probably include Ultima. Recall that Alma can learn it in the final battles as well.