I'm having trouble with this mission. For those who don't recognise it by the name, it's the first mission you do with Lance Vance. I can pass the first part where you kill the Cholos while you're in a car fine, but when I have to kill the rest of the Cholos on foot, one of them always end up kill me and/or Lance with his AK-47 or whatever strong gun they had. For those who have beaten this mission, I need some advice.