I don't think NC has helped anyone besides addictive, compulsive, and/or overly obsessive people, who are annoying anyway.
Communication is more important than resistance.
Positive communication attracts; so yah, if you communicate negatively, NC might be the cure for YOU.
Resistance repels; even though some people use communication to repel others, but I don't suggest it if you actually like the person and want them to remain in your life.
I understand that sexually, the female human body forms about a 2-3 week long attachment to whoever she has sex with. Besides ridding that biological "spell", there is no need for it.....besides to break up with someone.