I'm 20 and I still have not figured this out. My work has a de facto dress code of heels so I've tried a bunch. First I was wearing pumps but I found that either they were too loose and would slip off, or they were too tight and would feel like a medieval torture device.
Recently, I got a pair of slingbacks, and they're much better. They don't cut me and they've got built in in-soles. But I'm still having issues. Largely, it's because my feet keep slipping down and crushing my toes. It gets sooooo much worse when I sweat (which is inevitable). It got so bad that it ripped off a layer of my nailpolish.
I have pretty narrow feet so that might explain why they keep slipping, but tbh I really need a fix so lmk 🙏🏻🙏🏻🙏🏻