dont know if this is much help but...
i did a lot of different intensity techniques for my crappy calves to help them grow and nothing seemed to be really effective. drop sets, 21, rest pause, HIT, straight up low reps, straight up high reps, straight up moderate sets, etc. there was nothing that worked really effectively.
then, i started doing leg curls with my toes pointed perfectly straight and not arching my back at all, and my calves grew a noticeable amount in a short period of time, something thats never happened before.
if you dont already do leg curls this way, try it.