You don’t need that much. Once the goons know you’re afrmed and they will be shot at, they’ll move to softer targets.
One very valuable lesson I learned when I had to discourage a group from coming at me:
As a group, they knew they could take me. As individuals they knew I would kill the first one to come into reach. Nobody wanted to be first.
It doesn't matter how many there are, if nobody wants to be first.