This person would need to agree to use fields. There could be much stuff behind this. Black magic, entities that are stronger than parasites.
I would give this a go. It has all different fields plus very strong protection. Topical application works even faster than mandalas and maybe they would be more open to try physical product. People’s mind connects salves and gels with solutions. This also works on immune system that is often completely shattered when attacked by dark beings.
I use it on my third eye every day to make sure that my judgment is not affected by anything.