How many sets of the same movement do you think you need? And, just out of curiosity, why do you avoid going to failure?
After some fractured sleep, as I reported in my earlier post, I took a week off, and started again today with my 3x/2wk frequency. I decided to add supinated chin-ups again. They gave my compromised shoulder grief in the past, but I think that was because I would go to full extension at the bottom of the movement as I normally do for pronated pullups. So this time, I would stop a bit short of fully extending my elbow at the bottom, and my shoulder did not seem to be affected. Although I prefer full range of movement, this was close and didn't feel like much of a compromise. Plus I added a myo-rep set for it as well.
And so, now I am doing a myo-rep set (only one) for each of the following exercises: pistols, pullups, chin-ups, dips, and calf raises. (I don't do them for my two sets of inverted rows, my pushups, or my two sets of pike presses. At least not for now.) Each such myo-rep set follows the principal set within no more than about 20 seconds, whereas rest between different exercises is in the range of 60-75 seconds. And since I can do 3 or more reps on the myos, I consider it to be another set (my party, my rules).
I used to do this to a certain extent in the past, but I called the myo-reps rest-pause. After a while, It would become a bit much since every set was to full concentric failure to static hold, and I would need to pare it down, even at the reduced frequency. However, since I'm now doing my workout first thing in the morning, and with considerably shorter rest between sets, "maybe it'll be different this time" and I'll get all swole.