The sharpie and the gunslinger are slightly different than those above in that they are more precise focused with their weapons. So its similar to those above but not quite the same. The firebug can also be fun if you like to slow roast your targets. Depending on weapon choices the demo can also play this way but being the high damage / large area expert their role is more explosive. These three are the high ammo expending perks in the game. If you enjoy support and mando then you will enjoy the SWAT as well.