Ok. Epic idea. Get your team of four and enter a single elimination tournement of 16 teams. 10 minute games played to 300. Then after each round the winner advances and the loser is eliminated. The better ranking you get the more credits you recieve. And the winners of the tournement are rewarded handsomely.
I say this could be done for both slayer and grifball. This would be 100% awesome.
It would be a playlist you could join and then after finding enough teams the rounds begin.