A big part of God's plan might be to lead you to another spiritual home where the environment is not toxic. Once a mobbing ensues, it means the atmosphere is irrevocably poisoned, at least until the chief troublemaker or troublemakers either convert or depart. Usually, it's their departure that brings peace. Conversion may take much longer.
Although you may be reluctant to leave a familiar parish, you may not find peace and happiness until you do so. Making the decision to change parishes is extremely difficult. Your new place of worship won't feel like home until you've been there for awhile. It almost reminds me of dying and going to Heaven. We fight hard to stay alive because life here on earth is all we know. But once we get to Heaven, our true home, I don't think we'd ever want to leave, and relive the pain and suffering we can't avoid in this life.
For a discussion of female malignant narcissism, please visit my Female Bullies blog.