It is not possible to give such specific instructions via this forum. It would be irresponsible of the Docs and possibly harmful to you. Treatment protocols and goals for situations like yours require examination.
And it really doesn't matter - arch height has no relevance as I note in the article.Oh so there really is such a thing as "flexible flat feet"? I had never heard of it before that PT mentioned it back in December. I still maintain that my feet are nowhere near flat, weight bearing or not, despite PT trying to say I have them.