weakest - neck: mostly because you have some space to glitch through wish make it so easy to dm.
strongest - ankles: they are small and doesn't have alot of space to glitch through so its hard af to dm it(except when using grab ofc).

well wrists are weak but they come after neck,knees and abs imo. they get dmed because of the pressure from the full extending when you hit with them and because of the tori's weight if they dm on the ground
anyway it can be fixed by relaxing,holding and contracting them.