My suggestion :
It was like this in the King of the Hill challenge (https://forum.topeleven.com/top-elev...full-time.html)The C.L./S.L. and Cup can have opponents from different levels (maybe near LV, so to have similar sources and experience) but playing with associations (similar) quality.
The best event by far.
We were playing every day against 9 teams with similar quality, different levels (but close) and different servers.
So it can be done from the program.