IMHO, We all (at least I do) think of each other as equal brothers , that's how we keep from "rivals" and constants disagreements.
If you choose to rank one team as better, other teams might disagree and cause an argument and so on. So that's a reason why this hasn't been done.
Unless you do it in a manner to include each team and each team is happy with their rank.
Good luck though it should be interesting. 👍