The current way that the coliseum fills out the top 10 doesn’t really work. Currently each round someone gets into the first spot, then we they are defeated, they drop to 2nd, and the rest of the top 10 fills out subsequently. The problem lies in if somebody whose team is at the top of their tier get the 1st spot, nobody can defeat them, causing the top 10 to not fill out, and denying an entire tier of players who can’t get an opportunity to compete/rank up. Perhaps when players win a fight against any other player, they are placed in the next available rank, from top down? The top 10 will then fill out with a variety of powered players giving the rest of the players a chance to compete.
The secondary issue with the current rank system in coliseum is that when a high powered player does get the top rank when the round starts, they are continuously being fed a disproportionate amount coliseum coins because they are the only option to fight get on the top 10.
I’ve seen at least 3 rounds in my tier where top powered player/s held the top spots and no one could defeat them, leaving the 3-10 ranks unfilled at the end of the round.