Hi @teddyz, I know tapering off of prednisone and worrying about if you will ever be able to taper off are thoughts that have been with most of us who have struggled with PMR and trying to get off of prednisone. It is stressful and I think it's one of the reasons we have to taper slowly. Here's some information that explains a little about stress and tapering off of prednisone.

"It mimics the stress hormone cortisol. When taken for extended periods, prednisone interferes with the body's natural production of cortisol. As a result, it is not recommended to stop prednisone abruptly. Doing so can cause body aches, fatigue, fever, and other uncomfortable withdrawal symptoms."
--- How to Slowly and Safely Taper Off Prednisone: https://www.verywellhealth.com/does-prednisone-tapering-minimize-withdrawal-190242.

There is a discussion that might be helpful if you have not already seen it.
--- PMR Dosages and Managing Symptoms: https://connect.mayoclinic.org/discussion/pmr-dosages/

Have you made any lifestyle changes in diet or exercise to see if they might be helpful?