Ye I was thinking of the same thing but theres a way to speed this up even more ....
But the other person will have alot of deaths ..
Works best if you have 2 ps3's though. 1 with a dummy account...
When your in a game just wrap a rubber band around R2 button of the dummy account ...
That way when a round starts (with a high timescale) the dummy account will just kill himself wich gives you a win ... That way you will get a win every 3 seconds