Get some of that Scarlet Oil from the pet supply or feed store for her legs. It has oil which kills the mites and antiseptic to kill infection. It doesn't come with a spray top so you will have to ask for one or improvise. I spray the whole leg, knee, bottom of the foot excetra. Spray it away from your clothing. I haven't really had a problem getting the red out but just to warn you. A gal at the farm supply said that's what they put on show chickens to make their legs nice and red.
Let's see how this goes but I would redose her with the Ivermectin in about a week.
Now how do her poops look? When the poop sits for a few minutes there aren't these little white "thingys" about the size of a small grain of rice in it are there (I guess we need to wait until after she expells any other parasites from the Ivermectin treatment)? Those are tape worm segments. Just keep any eye out because then you would definitely want to use the Valbazen. I think at some point here in her treatment it would be a good idea anyway but I wouldn't do it now. Let her build up some strength.