He taps Lucure on the shoulder and whispers, "Guards." He points in the direction he last saw the guards before drawing his bow and notching an arrow. He silently crouches waiting for the guards to become visible in the soft torchlight.
As soon as a guard is visible he will fire an arrow at its throat and if that is succesful fire an arrow at another guard if two are still standing the one tht is going to make the most noise. If that isn't succesful he will shoot at the guard that looks like he's going to yell.