I am studying this for my self. As I see it, a healthy Empath is one that is not overly identified with being an Empath, and doesn’t get defensive when questioned about it. A healthy Empath also willingly is vulnerable and open-minded, and feels secure in knowing who they are. They take very good care of themselves and apply their skills in their own life first, and then to others, if it won’t harm them. They are good with setting boundaries, and believe they are enough, and are worthy of being happy. They are also able to have the wisdom to know who needs and wants help, and how to ask permission and not overstep boundaries. This is just off the top of my head. There is a whole lot more.