I know I am new here but I would have balked at 80 mg. of Prednisone.
I had pretty sever symptoms and started on 12mg, which wasn't quite enough so we bumped it up to 15mg. I split it to 10mg in the AM and 5mg after dinner. I made those changes because I crashed taking it once a day. A couple of people in this group suggested it and it worked for me.
Good luck ✨️