If your Boosting in CAGE matches like most people do then your KD wont rise unless its below 1.0 at the moment....your better off playing games such as HeadQuarters and holding back and just getting the kills up as the other team run in. The XP is much greater...your KD spread will be much greater and it will be alot less boring.
^^
This method is also possible in domination, but points arent as high.