I am sure the coaches will answer, however, just adding my observations. I had the same issue and realized the rTSS is race pace based TSS, which training peaks auto-input. Since we will be mainly doing uphill/weight hikes; the pace shouldn’t matter much. Kindly change the rTSS to hrTSS, which is heart rate based. It will give you more accurate results.
Please remember hrTS is calculated based on your “Threshold Heart Rate” & not the Aerobic Threshold. The “Threshold Heart Rate” in your “training peaks-settings-zones” should be your Anaerobic Threshold.
Also, once the hrTSS is calculated, don’t forget to add “Fudge Factors,” to workouts i.e.
A purely aerobic run/hike/ski while carrying minimal weight: Calculate the TrainingPeaks hrTSS and add 10 TSS for every 1,000 vertical feet of gain.
A purely aerobic run/hike/ski while carrying more than 10 percent of body weight: Add 20 TSS/1,000 feet.