Cursed wit is bugged for glass cannon builds who don’t regain shield on their own. If you fast travel with your shield broken you’ll lose the bonus. This can be tested with the targets in brighthoof.

People say you can get around this by using boniface’s soul to regen your shield, but I’m still skeptical as you’ll stop hearing that annoying voice that usually indicates it’s working. I’ve tried testing it but it’s harder to test in the chaos chambers when all your kill skills and stuff are also steadily increasing your damage. Either way though if you’re using glass cannon on a deadshot the body rune is a much better option as you don’t have to deal with your ward not working half the time.