i have orthotics and a very broad foot. Flyrocs, wave harriers, and spirit lites all cope with them and especially Nile Red Rocks II (though i know these are a different type of shoe from the other). Managed to use them with Walsh PB ultra reasonably well, much better with mudclaws though they are a crap shoe that last 5 mins and avoid inov shoes now other than flyrocs.
My orthotics fit Flyrocs the best but Spirit Lites my favourite shoe at the mo. The shoe they have fit the worst in was Salamon Speedcross 2, i was all over the place.
Coniv-8 not knowingly evidenced to improve performance