Getting SpyHunter Pro (for Consumate professional) on every level will only net you 111,500 RP, so the remaining 38,500 must be made up with Skill Shot Bonuses. Recommended levels to far RP on are Eye in the Sky (where you fly the UAV the whole mission and can get a lot double-kills) and Unfriendly Fire (where you are in the truck, controlling the turret and grenade launcher). Other possibilities are using the railgun to get Accuracy Awards, and the swarm missiles for Air Superiority.