Fayt's attack provided perfect cover for Vincent's own. The Charge Shot aimed for whichever of the guards looked most wounded--ready to take him down. Followed up with Trigger Happy against the other guard. Moving, Vincent took the needed downtime after that to reload and moved to place himself between any reinforcements and their group. Activating Shunshin to be ready even more for counterattacks.
Not sure if <i>Stealth</i> wore off or remained while he was shooting.