PD I do think you are over complicating this:
The known:
RRs count for average (exc BoP3/5 as all done);
MP (scored or challenge) will zoom you to Legend, but once L they will not zoom you to TL.;
Earnings also affect your progress, but sadly WGT seem to choose to leave MPC earnings out of the equation.
The X Factor:
WGT will not, for good reason I think, share more.
After that just chill. Go have a smoke, play some guitar or even WGT :)