I'm pretty sure I know how to implement this. Using MobArena equipment signs instead of dispensers. Cover the up with pistons that retract when a tower is captured that gives a power up And people wear colored Armour to distinguish teams (that's already part of the map, chain and gold is the same) so players would just have to know not to hit someone wearing the same Armour as them. I am confident this could work, except for maybe getting enough players. Sethbling is pretty popular, so if you advertised you were hosting that, you would probably get more people coming to play it.