Rocket jumping
It is a good choice to use ultima cannon to rocketjump around the map. It is possible to obtain the uberhealth by rocketjumping. For those players who are lousy players,they can rocketjump onto one of the bunkers and try to shoot at enemies. Hopefully they will not notice you and you can continue shooting.
Third generation of the grenade launcher. Has attack of 90 and regular recoil. Can be obtained in the shop since lvl 10 and above. Good to use in crowded areas in maps like fort winter. Must be warned that this weapon can kill you very easily if bounced back or pointed to the ground.