Fifth-ing (fifthening?) Galeforce. It really is far and away one of the best skills in Awakening, if not the best (honestly I'd argue that it's not even that far behind the likes of Limit Breaker in terms of usefulness), plus the other female-only skills aren't even close to worth it (though it's kinda hilarious to pass down Demoiselle to Brady), Lancefaire is the only one that even sort of works, IMO, and Brady, with his abysmal strength regardless of who his father is, can't make that much use of it unless you run some weird kinda magical paladin setup with a Shockstick (and at that point you're basically a significantly weaker, and less versatile, albeit slightly more resistant, Dark Knight, so it's kind of moot).
As an afterthought, though: Dual Support+ from Valkyrie isn't that awful, if you want to run Brady as a full-time pair-up partner... but Brady's really more suited towards a lead sweeper type build IMO. I mean, he's one of four potential Galeboys - might as well make use of that niche.