Quoted from LOTR_breath:For a better alternative to pump and dump(which I am perfectly fine with), I would endorse a format where you get 3 attempts at each machine. All attempts count, to be added up for a composite score for each individual machine. Like this:
Adding up scores is a Really Bad idea--lots of games have nonlinear scoring, so one good game dominates bad games.
A tourney in Brisbane a couple years back was total score over four games -- two on Met and two on Avengers. Never minding that this makes Avengers worthless, the winner's score on Met on one game was higher than each other player's composite score, since if you get your teeth into Metallica you get many, many more points.
Best-score-of-three is probably more fair.