Flamestrike
Legend
Not to give away the game but consistent backstab on a reaction - pretty nasty!
See above for why that doesn't really work (you're hiding behind the fighter and reach problems).
I guess a whip works, but then cover kicks in.
For mine, a Rogue 12/ BM Fighter 3 looks better. 5 Sup dice (with the F/S from Tashas) to Riposte.
@jayoungr