I agree that it looks like favus on the head and face, and gout (the articular form of gout) in the feet, which is a type of arthritis. Interestingly, when a chicken with gout is necropsied, the organs will have a white filmy substance covering each organ and each joint.
The one thing that looks different for the face is the swelling and crusted drainage around the eye and beak. Have you looked inside her beak for any yellow material or smelled a bad odor that could be canker? The swelling and eye drainage/crust is common with a respiratory disease called MG. I would clean her face and eye, and apply some Terramycin ointment to her eye twice a day. The miconazole can treat the favus. If she has faces mites, vaseline applied to those can smother them. Let us know if there is any yellow gunk or material inside the beak.