I continue to see the average listed as a prerequisite to proceed to the next tier.
I have only 26 RR and an average of 69.5 and am a Legend , though it may have been slightly lower at one time. Never has it been below 60 since I do not use the ranked courses.
I have been for the most part strictly coin rooms , as that is the style I prefer. I am proceeding with the hope that 750 games of a 30 score or less will take me to TL , as it was the same process that took me to legend.
If it doesn't , I will survive at the legend noob I am.