When I left my AH, I had no contact with him for a couple of months and after that only what minimal contact was necessary to deal with the upcoming divorce and sale of the house. Since I left 9 months ago, I have seen him 2 times. The first was a couple of months after I left and he was begging me to return. That is when I told him I saw no future for us and that I wanted a divorce. The second was when I finally talked him into selling the house.
For me no contact was absolutely necessary to avoid all the drama and anger and everything else he would have thrown at me. It would not have changed my mind on anything and would not have benefitted either of us. Keeping the contact now to emails as necessary keeps things from getting personal and allows us both to keep everything businesslike. I prefer it this way. I have moved on emotionally. I do not love the man. I don't particulary like the man he is now, even with the alcoholism out of the equation.