It's hard to know the LL when she's ready to walk. You may have to think about things in the past. What would she do for you that "spoke" her message of love to you? That is usually a person's LL. That is how she would read it coming from you.
I would not get stressed about the LL too much at this time, b/c I feel there are other things to deal with before you are at the place to do that.
When a W is ready to walk, she often will use the MC to validate her reasons for leaving the M. Unless your MC is very pro-M and sees what W is doing, I would not push it. I think MC could help once she decides to reconcile.....but not to save the M. She's not in the right frame of mind.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!