might as well get some endurance here....

the one who can go the longest while still competeing without drinking or eating anything...

the one who can wholey choke themself the most with a single hit from a bong, but it's judged by who can hold in the most smoke of the hit for the first 15 seconds (i.e. not cough the hit out, even tho you are clearly coughing/choking...)

one that involves multiple judges would be best bowl pack.... the contestants each pack a bowl, and no less then 3 judges are then to smoke the bowl among themselves and judge smoke/air ratio, conservation, and most even burning...

who can roll the longest lasting joint/blunt (contestants roll their blunts and they all get circulated at the same time... standard hit hit pass formula... last one still being passed around is obviously the winner)