Xert XSS in the Xert Adaptive Training Advisor is recommending 76 points of completely aerobic base.
My FOCUS is set for "Endurance".
I earn roughly 1 Xert XSS point per 9 or 10 Kilojoules of work, at about 170 watts of power. There usually is not enough time in my day to head out for an easy road ride. SO, I will probably perform this ride indoors.