I would try it by cutting into quarters, try 1/4 reduction a month. Start with 1 day a week, then two etc.

My daughter age 50 just did the Kona Iromnan! 91st in her age group of 218, she finished and didn't die.
She is not recovered. It would be awful if she got PMR, my father had it, now me,
Good luck getting off pred!