Hey trump. My only thoughts- don't bother telling her anything, just do what you do. The whole actions not words thing. You can simply reply by text only, and terminate face to face conversations before they start.
As for the constant spew, I'm a bit of a PHD. I've made it about 22 months now without displaying any emotion. It's almost gross, my replies look so sterile it's like they're PR releases from a big company. They are as short as can be, they address what NEEDS to be addressed. They aren't warm and friendly, but they are professional and polite. And if you put everyone of my texts/emails together and read them all you'd never find a trace of resentment. Oh- and if she spews hard I might simply not reply to that email. Or I'll start a new email a few days later and only reply to the piece that required a reply (as opposed to replying to the email she sent that was across the line).
I picture myself as a kids toy that has no batteries in it. She can push buttons, but the lights won't come on. I don't need to be her punching bag. She'll have to get her kicks somewhere else. But by being civil I'm still able to maintain the required communication that is best for my children.
Me:38 XW:38 T:11 years M:8 years Kids: S14, D11, D7 BD/Move out day: 6/17/14, D final Dec 15