A1: When one gets really angry and charges you stun it and then use your grapple at it which should take off his shield then do the same with the other once both are without shields when they get angry one will use a stone ray which at that point goe to one of the shields and pick it up and point it at the centaur which is going to use its stone ray on you once youv done that it should freeze the centaur then keep shooting it until it gets out just keep doing that until both are killed