If you're group ganking (6 or + people) on red zones your method can be useful cuz most people dont suspect about scouts, but in black zones people dont cross scouted tunnels, in this case is better to have only 1 person on the middle calling the objectives, the rest is wating in the S, W N and E corner (away from gates so people dont see u), when you see the objective no matter where he is going, you can catch it, because in the moment he reach middle map he has no bubble
