How long should I give her after NC to start coming around & discussing things?
Keep looking at the bigger picture. I know it's hard right now to see how your efforts may pay off, but no matter what happens...they will. Even if she never does come around, you can feel a measure of pride in the fact that you responded calmly and with kindness in the face of adversity.
If you believe Steve Harley (and I do), meeting her EN's will eventually begin to fill her love bank, if she allows you access.
Filling your spouse's EN's is a remarkable thing. My FWH and I have finally learned to set our defenses down and love each other the way we both want to be loved and it is truly amazing how those feelings of resentment and bitterness are replaced with feelings of romantic love.
Plan A is designed to bring about the end of the A. If NC has been established, the end of the A has been achieved. It could take a long time before the impact of her choices begins to affect her.
As far as pushing a little about MC, your job as a husband is to care for your wife and to communicate to her how she can care for you. Be careful about pushing. Let her know what you would like from her without any hint of a demand.
On the EN questionnaire, perhaps you could tell your wife that you would like to learn how she likes to be cared for, and that you would like to avoid anything that makes her uncomfortable. If she isn't feeling pressured, she may be less likely to resist.
I admire your efforts and I'm terribly sorry you feel so lost and alone. Also, I think you write just fine.