On wasteland, since most games I play people camp inside the trenches, I have developed a class to prevent this.
-Scar with grenade launcher
-Thumper
-Scavenger Pro
-Danger Close Pro
- Any green perk you want.
-Semtex
-Flash bangs
The grenades give you the chances to clear out the trenches in one go, as does the thumper, but the scar gives you chances to shoot people. The flash bangs allow you to run and get some ammo with a lower risk of death.
Lots of fun, after the multiplayer deteriorated to what it has become.