Just be sneaky shoot at them and move chill there for a while move when they get down just wait to shoot him then.
It might not be the smartest thing but I usually run up to the 50 even when i had my spyder. No one expects it on big recball. Where I play at there are like no rentals at all but there are a lot of Angels, impulses.... You are bound to get shot if you sprint like hell. Last time i did this i got shot once in my right hand and once in left but they bounced. I was in shock.