I think it would be excellent idea to use farm to boost all kill/death ratio this way you can play like a pro and kill everyone a lot and die a little that way you will be winner and ace then you can farm some more you can make many extra account then log them all into one game then when you join the game you will be playing but the extra accounts will not play because they are extra and there is no one there to play them so the will not move or shoot so you can go up to them and kill them very easily and take their guns and they cannot stop you this way you will get so many kills and it will boost you so much and if you do this it is much fun to just kill a guy over and over that is not moving he can just be all headshots or all knife kills then you get more experience and it is more fun and you get more boost and they are more dead then you can join a real game and you will have so high kill/death and so high level that they will cower in fear because you are so pro and it will make you the ultimate fighting machine killer in all the crossfire universe you will be king so make sure to get many extra pc and many extra account to play in your farm game this way you will get much more experience