I think Harry will end up with a sword because according to JB, he's going to take advantage of everything he's got during the Big Apocalyptic Trilogy, including all 3 of his evil offers. Why shouldn't he get someone Good on his side too? Sanya's an ex Denarian, maybe since Harry's so tight with Uriel he could wield a sword and be a Denarian simultaneously.

Speaking of that, I am SO looking forward to Lash vs. Lasciel, whenever that fight happens.