So, I helped a friend get Ghost Pro in an FFA game and we had a 7 of the 8 people in the game as friends. Then we decided to have everyone make a custom class with an Olympia. It was SO much fun, but after one game we decided we should move to a private match so we don't destroy our kill/win ratios.
It was fantastic. As the host I can create a specific class that everyone has to use, I can make it so that dying removes points, etc. I made one class that was Olympia/Ballistic Knife, Lightweight, SoH, and Marathon and we went to town. On top of that we had more guys join so we had 10-11 people playing FFA that style.
It was absolute win, we'll be doing it again.