Complex No. 6 - The turtle and the rabbit

[Complex]

I seriously need a game plan. Because I think my marriage is now at the very very brink of D. She wants to move on ASAP. As soon as I'll get my greencard she will file and proceed.
I probably ran into a few cheese less tunnels today and had a bit of a throwback discussing with her. She is a genius throwing me into a defensive position. But I feel better because I simply feel stronger, doing the right thing and handle things very maturely.

But what now? She's gonna file. Nothing, absolutely nothing or no one will stop her anymore. I just know it, and my gut feeling is usually very dependable. Plus she said so, and she means it. Go ahead and tell me it's an assumption. I'll be stubborn and tell you I know better.

OK, my sitch, retrospectively and looking at my own future: WHAT should I do???? Since I keep running into cheeseless tunnels during Amy serious form of communication and nothing what I do or did, action wise, consistently or not, works. AT WHAT POINT should I change my strategy and/or give in?
I feel like it would be beneficial if I start cooperating finding solutions and not stand in the way of the D or LS anymore. I can stretch it, make it painful and stressful or start cooperating on a level that doesn't cross my boundaries, let her leave and move on, let her learn her own lessons, move on myself and if it happens that we both grow and our paths cross again and the love revives, cool. If not, cool too..at least there will be some sort of a cut. Question remains if I should shoot for LS, which is the better option if I don't want D. But it will leave me with hopes. This will become a very serious and hard decision for me.
Right now it just feels like a fight who is stronger in his opinion, not beneficial for neither one. And since it's only a question of time until she proceeds with legal action, my time is limited. Need advice...or am I overthinking again because of what happened today? I took a stand, but just to see how closed she still is.