Ok a third question with having time to reflect these past few NC days.
3. Lately he seems to be changing his script about me (Ok yes, during times of sanity.) I was prepared for the usual script about our "fundamental differences", how we are "mortal enemies" and how our relation is "toxic" so has to be ended. But he changed to:
A-Before he said the shy kind woman he fell in love with is dead, but two weeks ago he said, "It is so obvious to anyone with a brain that you are shy and kind."
B-Before he said vague things about how loving someone could hold you back in life, and how I had made it difficult for him to do research because I always told him I missed him. At the university, he said, "No, you never held me back from anything." Said just minutes before the monster moment actually.
C-Again at the university, he said, "You will have such a great life without me (more about the great job I will have)." "Aren't I just a joy to be around?" 30 seconds later he was throwing furniture.
D-Discussion of how my parents handle their differences in an argument compared to his parents. He was glued to that conversation for 10+ minutes, asking me questions and describing his parents fights but then monster reappeared after he was silent for about 5 minutes while running on the treadmill.

Is this some sort of weird progress and an indication that he is thinking more clearly at times, even progressing through the tunnel?
If so, then why revert to monster? And why did monster disappear so quickly and he make such efforts to help me with my research?
Any help with how I should have responded to those statements would be much appreciated as well.