I've used this pattern before in game AI's and it works well. If you combine it with a somewhat random searching incentive the "hive" will spread out and search

I've used this pattern before in game AI's and it works well. If you combine it with a somewhat random searching incentive the "hive" will spread out and search for the player(s). I also let the "hive" communicate with each other if they find a player they let each other know and then set a new waypoint for that area. When they repulse each other they take different pathways around objects and it looks a feels great to play against.