What's the best way to destroy a narcissist?

Don't get me wrong. I don't hate my soon to be ex. wife. i realized she was a narcissist. she was wounded as a child by her mother. however her mother still has control over her. she's a child in an adult body. we married and blended familes. she had a daughter and i had two kids. i knew the pain for the kids and us about not working out. she obviously didn't. she was engaged twice before me and her daughter went through multiple fathers. she told me you're the only father she will ever know. then she left. she's a narcissist. i stood up to her crap. she wasn't strong enough to move away from her narcissistic mother. now her daughter is paying the price as well as my 2 kids. she's been doing this for 10 years and everybody cleans up her messes so she just moves on. her mother is so narcissistic she wanted the marriage to fail. they say the best way to make a narcissist realize and grow is to expose them. outside she projected the perfect woman. she had DWI's, abortions, and broken relationships that nobody questioned. It was oh you pick the wrong guys. Wrong! I finally exposed her to her parents. The ones she was afraid of. All the stuff they didn’t know only the poison she told everybody to get sympathy. Now she’s stalking me every morning. I’m the parent she never had and she’s mad as hel@. They say punish the little kid in them then love them for it because they never had that when they were a kid. I’ve had no contact with her for 3 weeks though after she left. What should I do considering she’s a narcissist? If you don’t know about narcissists, don’t answer. You wouldn’t understand what they need or what you need to do so they can experience true love. They never had it and it’s foreign to them. I don’t want to destroy her but just her false self so she can love. How to do that? I really need answers from the therapists trained in this.