What are the best insoles for supination in work boots?

Your situation reminds me of my husband who used to get the same outer foot pain from supination in his work boots. The simple insoles i bought never used to last. But what helped him was custom orthotics. They fit in his boots and gave great support for his arches. After a few weeks of wear, he didn't complain of any pain or discomfort anymore. So, I would really recommend investing in custom orthotics if you’re on your feet all day.