I don't agree with sitting in the back of the map (or camping at all) but technically 10 and 2 helps your team more than 20 and 20. My kd is -blam!-ed from when I started and was terrible but while I was still playing I tried to focus more on running from fights I couldn't win. Not so much worried about kd but about helping the team win by dying less even if it meant sacrificing a few kills. Assists are always aggravating but in the end they help the team. And I did notice the random teams I was on started winning more when I played this way.