Mmm, another thing. My XNPD accused me of crazy, crazy stuff in the custody hearings. I don't know how I made it through it, honestly. But let your works speak for your character. Also make sure it is said clearly, and often, that while you want your children to have a healthy relationship with their father for their own well being, you fear for their safety because of his alcoholic drinking and his physically and emotionally abusive behavior. Mention that he refuses to enter treatment for either predicament. Document it, present it, and leave it to him to prove you wrong. He can't, so, *uck him.
Family court judges see this stuff all the time and are impatient with the grandstanding of vigilante parents. Really dig deep to find the strength of your integrity and HOLD ON. Fighting with a man who is unstable and motivated to take you down -- publicly -- is one of the most difficult things I've ever done.