Kazu, If you are referring to seeing a difference between planned TSS and your hrTSS, please make sure to add in additional TSS for the pack weight and vertical gain loss, as outlined in this article:
Looking at your last hilly workout, you can add a significant amount of TSS to your hrTSS value. With future workouts, the more vertical gain, the more TSS you’ll be adding.
The important part is focusing on steep terrain with the targeted intensity and duration, not the exact hrTSS.
If you are referring to the continuity of hill climbs, it’s ok for some of the longer days to include multiple loops/laps or hill repeats to get the vertical gain. I’d prefer that mountaineering athletes repeat a steeper section several times rather than do a longer, less steep loop hike. A lot of our athletes have had a lot of success on big peaks with many of their workouts comprised of lapping their fire stairs in their high rise or doing these sessions as repeats on smaller steep hills.
If you are really running into a problem accessing steep hills, you can certainly do some sessions on a stair machine