Yesterday, we played sumo, and I noticed that the arena is way too small to handle the (literally) hundred people that were playing. It was more luck-based to get to the final 20 than skill-based. My suggestion is to change the arena to make it able to handle a lot of people, but still be possible to knock people off. Here is an example of an arena we could use (Stone is where the edge of the spectator's view):
[spoiler=Example arena]
[/spoiler]
This arena would use the space in the area given more efficiently, and people could actually spread out before the game begins and not be confined into a really small area.
