I know there are many threads on how to slot outdoor rides into the training plan, and I have searched for some answers here, but I have some pretty specific data with which to work. I ride with folks during the week (usually on days where a TR workout is scheduled), and these rides have a pretty specific profile. It is usually a 2 to 2.5 hour ride where I am taking 5 minute pulls every 20 or 25 minutes. My pulls usually start out around 105% FTP (the first one or two), then quickly move to FTP (next one or two), then below FTP. Route usually have no stops, so power is always on the pedals. They are training rides for the others that do not ride indoors. After the ride, my NP and average power are the same as a TR sweet spot workout.
So I am wondering how to classify, or more importantly, which TR workout from the week to remove in favor of these rides. I am in sustained build HV, so it looks like a 5min interval ride (like Wilhelm +5), but the rest periods between intervals in the outdoor ride are way more intensive (and longer), as I am having to sit in draft of others doing about the same w/kg I was doing. But most concerning is that because of this, I cannot achieve the prescribed 108% FTP for each interval.
Does it sound like I am selecting the right workout to substitute, or should I be substituting a SS workout from the end of the week and still doing the short interval (5-7min above FTP) TR workouts?