Seems that you guys are most likely "correct"......that getting down to that 55.00 Avg. is a key criteria for reaching the Tour Champion tier. That, many TC's averages have since floated upward since they're averages reached 55.00 or lower.
Uh, and no Ken, I do not just play WGT's Best Of Par 5. I reached the Champion Tier back in November of 2015 and I've been averaging approx. 85 ranked rounds per month here on WGT. My scoring history doesn't go back very far, but, I have been playing all of the courses (plus, I have played all of the CTTH courses...though, know those don't count as ranked rounds). Par 5 and Par 3 courses do NOT count towards much of anything, I understand that.
Take a look at my clubs vs. your clubs. I probably would help my situation by upgrading my clubs. And, the for the past few months, I've only be playing with the Free WGT balls....and putting up low enough scores to lower my average is seriously challenging. I used to play with much higher quality balls....however, I haven't upgraded my clubs since I became a "Champion" back in Nov. 2015.....so, I managed my stats using these pretty sorry clubs.
It appears that "maybe" if I manage to get my Average from 55.6 down to 55.0.....I might reach Tour Legend. Great if I do, but, it's fine if I don't. I sincerely appreciate everyone's input here.
Good Luck to everyone!
Jim