@girastancil, Hopefully other members with PMR who have used treatments other than prednisone can share their experience with you. The only alternatives I've read about are Methotrexate, Leflunomide and Tocilizumab. Here are a couple of articles on alternatives. The first one is a free publication, the second is an abstract and one you have to buy if you want the full read.

"There is a lack of definitive evidence for steroid-sparing drugs in polymyalgia rheumatica. Methotrexate is typically used for relapsing disease. Leflunomide and tocilizumab are being investigated, but further research is needed."
-- Prescribing for polymyalgia rheumatica: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5828929/

"Conclusions:
Agents such as methotrexate and tocilizumab have been used successfully in conjunction with oral glucocorticoids and have demonstrated steroid-sparing effects. A promising adjunctive treatment is the monoclonal antibody, tocilizumab, which has been studied as both adjuvant and monotherapy. Further research in the efficacy, safety, and affordability of these agents is warranted."
-- Alternatives to glucocorticoid monotherapy in the treatment of polymyalgia rheumatica: https://journals.lww.com/jaanp/Abstract/9900/Alternatives_to_glucocorticoid_monotherapy_in_the.39.aspx