this is what i do - use codes that have a bind for a fast restart, have my dummy as host, then once i reach about 55000 kills (2 dummies) i stop killing, slow down time, change one of the dummies over to my team. i then back out to save my kills (they still count towards the leaderboards if you restart without leaving, but only once the game has completely ended, so if i timed out in the second or third round, i would lose ALL my kills. hasnt happened yet, but i like to be safe) then i just click ffa again, end up back in my game, fast restart, and do it all over.

thank if this helped