Co-op mode suggestion

So i have played many FPS games and settled on this one however many other games have a co-op mode in which a group or a clan can fight against the cpu and work together. This mode would not have to raise kdr but could give exp and gp like normal modes. I think you would get some more players if you had this mode as i almost stopped playing because i loved this mode on other games so much. A good example of this mode is Combat Arms fireteam mode the game is a f2p FPS from nexon check it out and try the mode and lets try and get a mode like that for us crossfire fans.