Yes I know Valkyrie exists in the "Titanfall" universe but basically she operates just Boba Fett since you can fly above with your jet pack & use your missile launchers from mid flight to rain down fire. Even though it feels a bit OP it's definitely balanced well since each rocket only lands 25 damage, as opposed to Fuses grenade which on its own can launch up to 45 damage.

The trick is not to get to comfortable with her flight abilities cause there are many times you want to fly out of danger but you can't since you have to wait for your jetpack to refuel. Her abilities are good but its no replacement for old fashioned good shooting skills.