When you become a hero go up to one of the sniper spots and lay a mine. When alot of people come position yourself so that when they turn the corner you can blow them up or shoot them. Try to lay the mine where the enemy's cant see it intil its too late, and try to use one mine at a time. The other day I was doing this alot and my temmates came too, so like the whole team was in a small room and when an enemy turned the corner it was an awesome firing squad. P.S. dont be exposed from behind in the room so people outside cant shoot you. you can getlike 15 killstreaks consecutivly if you are skilled at it.
Let me know what you think, and your experiances doing this