Hey Bogan,
Good to see you on the forums.. you probably post more than me
. I'd say that your config's not going to be your biggest help. Mess might disagree, but you might find it more fun to see where the choke points are and just get AE damage weapons to spam into the point... if you're looking for more kills - ie. nading is a good start (Click and hold for 3 clicks, then throw it 30 degrees higher than where you want to shoot at - or close to a door.) or easier yet, get an rnade/panzer shoot it at the floor just outside the door on the other side. You can try mortar, but that really takes skill.
Apart from that, I'd say you'd need to find some nice spots in some maps to just put your cursor on where the heads of the enemies are bound to appear and just shoot on sight. Running forward into choke points is probably not going to earn you many kills. Spec some people like G-train, Mess, nico, hicksie or even Horry. They generally do have some good examples of good things you can do for some simple kills (ie spots where they normally lob nades, angles which they shoot rnades, places they HIDE to backrage me... etc.etc. all good fun.)
Hope that helps.
Myther