I personally still prefer the Rocket Pod, not always the time to lock on to someone. It uses 30mm shells, but still has lock-on capability. Fires 5 rounds at a time, and despite the low ratings on it's damage, it is a decent weapon. Lock-on capabilites are nice as well. If it had a better range than 400 meters, you'd probably see everyone on Greenfield using this weapon more often.
Energy weapons divide the damage between the two.
Missiles and grenades can damage you if you fire them too closely. The plasma rifle will rip you apart if you are too close to a wall or target when you fire it. Some other suggestions I can make that have helped me and a few others involve graphics, mech color, and frame rate. Anyone who has a solution to this please tell me, my girlfriend runs a Radeon. Color can make a big difference.