invite a friend to a player match.

switch lobbies to private match then combat training.

host backs out and ends party.

other person that was not the host invite the person back to combat training match that he is still in and quickly switch lobby to wager then player match.

game will either say its starting or needs five people, either way host needs to back out again while other person stays.(this will be the opposite person now(the one who stayed in the lobby to begin with)

host that backed out goes to private match and creates a snd game on any map with unlimited time and the goes to general options and lives and health options click on lives and health but dont change it yet just keep it up.

other person still in the lobby invites you back while you still have the lives and health thing open.

once in the game have the other person back out and once done so change the lives to unlimited and health to minuscule then press b.(this will leave you and give you host)

now invite your friends.

enjoy.

this wasn't found by me but i take credit for being the only full detailed post.