I have added solid arch/heel inserts to all my Altras including Olympus 4s. They work for me. https://www.amazon.com/dp/B07R5N5WWQ/ I doubt anyone can help you decide what works for you. I think you might have to try a number of things.

Pcssole’s 3/4 Orthotics Shoe... https://www.amazon.com/dp/B07R5N5WWQ?ref=ppx_pop_mob_ap_share