I have asked this before, but I'll try again.
It would be really handy if all clan challenges were based on tourney entry levels. I see too often, challenges coming in where players are used who are well below their actual playing level. There is one clan who does this all th time (no names) and although I do keep changing the challenges it should not be allowed to happen in the first place. Challenges should be fair, so why not make it harder for high level players who are low ranked to be misused.