Perhaps that sellsword whore you brought along?
Hell of a post there. Though for that duel...it'd be a hell of a thing to see Mirren up on the spot. Bring her out of the shadows and into it after all she's done, perhaps. Garlan isn't up to it- and I think he knows while Gendry's a beast, he's probably past it too. Wheras Mirren...would work well a nice theme to run her character to. :)
I guess I'm obligated now, aren't I?
Just so long as there's no magical fuckery going on!
EDIT: Good way to reinforce the fact that she's basically sexy Dornish Bronn.