Hi
I have plantar fasciitis myself for a few months now. My podiatrist prescribed me with Custom made orthotics which did not work at all. I understood that treatment efficiency is very individual. If something works for one it may not work for the other.
I have found Taping very useful.
There are many kinds of inserts that you can try. In my opinion inserts and orthotics are individual like the rest of the plantar fasciitis treatments. The good inserts for me will not be good for you because I have flat foot and you have high arches.
There is a good web-page explaining the subject and more in this informative website-
http://www.plantar-fasciitis-elrofeet.com/Plantar_Fasciitis_Inserts.html
Take care & Good luck