I'd be concerned that armor guy might be alive and that he might try to break free. Someone take a grenade and plant it in the ground and take some wire to create a trip mine by the exit. The shrapenel might not penetrate, but it might make him think twice before deciding to hunt us. Might also keep people from going in thinking that their might be more booby traps.
of course, while they're running from the robed dude, without stopping and potentially dying.
just toss the artifact up to some other guy in front so the robed guy wouldn't kill you (captain) since it would be a waste of time and give a lead to the other guys in front
or blind fire backwards, something to get him to not kill you.