I have discovered in my case, the "what" is the lie is not as important as the "why" is the lie.
In XABF's case, the lies are manipulations to get me back, and I am not going. So it doesn't really matter what tricks he pulls, or what stories he tries to tell, as long as I get the feeling that he's trying to pull me back in, I know there's an "untruth" in there somewhere, and I am learning to put it down and walk away, rather than try to figure out his mindpuzzles.