If you think it may be scaly leg mites then something thicker than the neopsporin would be better. I like castor oil as it's very thick and sticky, vaseline also works,or you can do both, oil the legs and then cover with vaseline. Don't worry about dirt that sticks to it. You have to keep applying every few days, it smothers the mites. It can take quite a while for the legs to start looking better, depending on how much damage they've done. I will attach a link with more info on scaly leg mites.
If it turns out to not be that (I had a roo that had problems with irritation and inflammation on his feathered legs) I would use either castor oil or coconut oil to sooth and I would wrap with vet wrap to protect the skin, wrapped with the feathers going in their natural direction and only just tight enough for it to stay on. That helped him but it flared up periodically, often at molt.
For her feathers, do you know her age? They generally have their first molt at around 18 months of age, but that can vary a lot, so anytime after a year old it can happen, and then they will usually molt annually. If she's young, then possibly hasn't molted yet. That first adult set sometimes is there for longer than a year, and can get pretty ratty looking until they molt. Then the feathers will be replaced with new, perfect ones. And rooster damage makes it worse, more wear and tear on feathers. They generally only molt once a year, so feather loss can take that long to be fixed. It takes a lot of energy to grow feathers, so they don't do it all the time. If she's a submissive bird, she may be a favorite of his and she may be getting more attention from him than the others, resulting in more wear and tear. Based on the feathers on the back of her head, I'd say she's getting a good amount of his attention.
https://the-chicken-chick.com/scaly-leg-mites-in-chickens/
