I *think* my H may he a little further in front of where you are at the moment, so my comments are from that perspective.
When my H has in anger phase, there was no point in all at trying to talk with him or make any sort of plan to do anything as a couple, he delighted in doing the opposite. There was no way at all he would have considered any sort of MC, he was just looking away from us and all he heard was blah blah blah stop my fun. Given this was so out of character, it nearly killed me, but the more I tryed to interact in anyway, the worse it got.
I found the anger phase got worse and worse (I got more more blame for things like bad weather etc) it almost got easier to see this was not just about me. All drivers were idiots, everyone was idiots (again very out of character), all his family were not worth talking to. Has he pulling away from just you or others as well?? For me it was worse just before he moved out of this phase. I reckon he needed to get all the anger OUT, he was hardly sleeping and just ground himself to exhustion before moving on.
He was so irrational, he mentioned moving out a few time but being so confused, I waited until the few open windows he would actually talk to me and said I didn't think any major decesions should be made unless everyone was certain, just kept trying to stall during this phase.
Looking back, I would have interacted far less than I did, so he directed more anger to others in his life and away from me. What worked for me was looking at what the next stages of MLC might be (Hearts Blessings etc) and work out how I wanted to be then. I think that when he was ready to finish anger, I could then show him a bit of a chilled out path to where he was going next, but mostly put my best foot forward.
I found the odd what the hell are you doing to me conversation actualy helped, just here and there. You have to wait until he is further along before having any sort of deep and meaningful with him.