By the way, how will the results from tournament to tournament be taken into account? After all, all discussions are currently focused on calculating the tournament rating for a clan (within a specific tournament). And what will happen to this rating afterwards? Will it be summed up or averaged? This will determine how to treat your proposal regarding the number of players.
Regarding the "lower threshold," I still believe that a minimum should exist because it's a competition between clans, not individual players.
Sincerely.