I’ve used custom footbeds made by podiatrists for many years. The best brand used carbon fiber to support the back of the foot, and was called ‘PAL.’ They are expensive, around $400 a pair, but the heel pockets are molded to my heels, and prevent slipping. They also prevent pronation and other afflictions that can hurt. And they have lasted for many years. Superfeet are not custom, and not as durable, but much less expensive, and a good way to find out if a footbed can work. A strip of tenacious tape across the bottom underneath where the orthotic ends, leaving only the foam pad, will prevent damage, and only costs a few cents to replace if it wears out.
Of course it helps to start with a mid or shoe that is the best foot you can find. I bring a zip bag of footbeds with me when going shoe shipping, and often spend hours trying on footwear. Sometimes the checkout folks look suspiciously at the zip bag. Even when I’m buying. With the number of scam artists that abound these days, it is understandable. Or maybe I just have a guilty look. No surprise, given my background. As the bar girls used to say, “Be nice.”