I'm really glad you have found a C you like, think you can trust and seems to follow the DB theories. That will be a good find for both of you if you are right.
I do hope H will go b/c your last attempt was during his A and he was still in denial and not into working on the M. However, if he doesn't, I feel you are right to say: "If he refuses, then I will ask for some kind of action plan that he proposes to tackle this situation."
Let's hope he goes w/you and wants to work. If not, let's hope he has a solution and a plan for you.