Just for me... No contact has given me peace ,calm, and a new perspective. Being "in" the craziness just keeps ME crazy. It's wise of you to realize that you think you still have some control of his illness. His sobriety does not (and should not) hinge on any action, words or contact by you.
I find that when I do things that bring me peace today, and that I will not regret tomorrow, a week, or a year from now- then I make good choices that align with my true self. Do what is best for you! It's so foreign to us, we always consider others too much. Take care of you. You have been so strong and you deserve it!
Just my thoughts. I wish you courage and faith in whatever path you choose.