We have done all of those as well including casting for 4 weeks, boot for 2 weeks, ice baths (which she hates and didn’t tolerate well, acupuncture and cheetah cups. I will say the best thing that was recommended to us and that we have seen the best relief and prevention has been wearing chaaco sandles. They are the best! We also put hard orthotic insoles in her other shoes. I hope this helps. I know severs is very painful and frustrating.Coming up on a year on and off (mostly on). Have tried xbrace, massage, nsaids, and taping. Nothing makes a significant difference.