@transcendentape I will gladly be done!
I'll just say this - you wanted to know how to prevent moisture from forming on the backside of the colder ceiling drywall. At least, I think that's what you were asking.
Doesn't seem like rocket surgery to me to add an air and vapor barrier above the foot of cellulose insulation on top.
I really think we're talking in circles because how we imagine attics to function is too different.