My solution doesn't require fiddling with the RR, I just set it to 99 once to speed things up. (And then using the Benny Hill trick, if you know the Cheapo level by Insane Steve I'm referring to.)
I saw the RR modification in ccexplore's solution as more of a technical detail than a defining feature, as apart from that, there aren't many differences between our two solutions. (I haven't watched any Mayhem 7 challenge replays other than ccexplore's, for the record.)
EDIT: Tested it, and my solution also works without setting the RR to 99. Time limit just gets pretty tight then.