You will need 2 people to do this glitch.
1.host a private match change to nuke town, Search and destroy
2. invite your friend
3.hover over combat training and as fast a u can Hit A up A(this will start up Array TDM)
4. While its loading the host has to go to dashboard
5. host goes to private match and hits SND and sets up all other things needed
6.host must be in the lives and healths option for this to work
7.player 2 is in a combat training lobby that is nuke town snd do not do anything to the game.
8. after host sets up all settings and is in lives and health's option player two invites host and then player two leaves without party.
9.Host invites player two back and now you can rank up.