First you go get a least 2 players 1 to drive and one to shoot
Drive the to the east/right then some body else can get into the tank let the tank in front while the car is in the back go all the way to the other side the let the tank stay on tey side going back in front and thats it

If you snipe on on the hill on the demo version they can not see you unless you kill the other person

To easily evade missiles while in a Warhawk/Nemesis, drift(hold L2&R2), randomly swirl the Right Stick around (you need to have Pro Flight mode off) and use the Afterburner (tap and hold the R2 button twice). Or just use the Chaff (right on the D-pad).