Here is a film of me surviving a 4 v 1. It starts out as a 4 v 2, and my wingie dies because I got too far away from him. I dont do anything special in this other than survive, I only kill one badguy with guns, the others are proxies. I did do a good job of not locking on to one guy for very long, as soon as I reverse one, another is close on my 6. Hope someone might get something helpful out of it.
4v1