I have used tea tree oil. I is best well diluted and used for scrathes, cuts, in the mouth, colon or vagina after the area is thoroughly cleaned. After my son was born i thought I had hemroids and used it to heal my colon as I had a month wait to get to the colon doctor. When I got there, he said I had the cleanest colon he had ever seen. That stuff is amazing. it is anti viral/fungal/bacterial.
I think it would be a good addition to any healing process.
Mites need a four phase treatment because each stage is like a completely different being. BoraxHP solution is good to dissolve the ones close to the surface and make them visible as little white dots and will help soak for a few minutes so with a paper towel you can wipe off and remove the dried shiny neem oil residue left after using it over night. Garlic is good anytime but if the skin is too raw, Neem oil with cocomnut oils good to kill the larvae at night say if the skin is too burned and you just can't take it anymore, the Matt Monarch Extreme Solution is good to get down deep in the skin when the first signs of mites is evident, Garlic is good for about every stage to dissolve the soft stage and make the old ones run for the hills ( some people sleep with that sticky paper at night to get those guys ) and it leaves a thin film on to dry up so you can go out during the day and not look like a mass of bloody battlefield and sulphur or epson baths are nice before bed to get rid of the old dead mites that clog up the skin and impede the natural cleansing process of the skin.
Tea tree oil might be good instead of the boraxPH or after it to purify the area if complications set in. Some even us vinegar because it will clean the area well and give the mites a shock... nice to keep them guessing.