One of my tutors at Laban(Dr Matt Wyon) has spent the last 7 years developing this Ballet shoe which not only protects your ankles and consequently your joints, but makes a pionte work comfortable!
Have a look at the below link. If you are a ballet dancer this is definitely something to check out and seriously consider investing in. Not only does it banish the blisters but help to keep your body healthy and perform to your best!