With her being in the condition she is I would think run an environment as clean as possible. Bare bottom setup with a couple of hiding places for her comfort. Get her on a good prepared diet like Reptomin and use mysis and store bought earth worms as an occasional treat.
I am not too familiar with disease so I can't help you much there. The claws will grow back though as long as the actual "foot/toes" are not damaged.
Can you discribe her current setup and diet? Any idea how old she is?