I think your intuition is correct - whatever you say to him will do no good. Don't put anymore energy into your dealings with XH. DETACH --- if you need to clarify something with your children then talk with them. You don't need to bash their father or dwell on the past but right now all your energy and focus should be on the people in your family. XH opted out of your family and his relationship with his D is completely between them. Of course, as D's mother you'll make yourself available to support her and clarify the facts if she is given wrong info. -- Bottom line is the kids know what the real deal is and no amount of deflecting is going to alter that. You do not need to waste anymore of your time or effort on this man. Let him implode. Let him screech about you to his D. In the end the truth will set you free.
You have been so strong and classy in the face of enormous struggles. You should be proud to have survived everything. You have earned the right to let him act irrational while you and your children go about your life. Let HWW have him because you don't want to give this guy one more second of your time or energy.
M:25 years at BD w/ 2 daughters BD: 5/14 Separated 6/14 - H moved cross country w/OW D Final 9/17
“I can be changed by what happens to me. But I refuse to be reduced by it.” ― Maya Angelou