Rock you need to put your emotions aside. Treat this strictly as a business deal ONLY. Your only focus is to get the best deal for you and your S to secure YOUR future and only your future. Your W isn’t going to fall for you if you just roll over on this one. There’s no “nice guy” here. You need to be blunt brutal and go after what you’re entitled to Trust me as a woman i would find that far more attractive than someone who is prepared to roll over and be weak. Women like authority and strength and someone who can stand. It doesn’t make your future any better if you give her everything and you’re left with nothing you will just resent her, and she will know if she ever comes back she can just walk all over you again.
I have already decided in my asset splitting should H and I ever reconcile I will never be merging finances again and will continue to keep my financial autonomy. When I go down a path where I am doing a business deal for my children ( like I am currently in) I am protecting those assets from anyone and everyone now and in the future. As a LBS too, you need to flip your script and stop taking her feelings her thoughts and her wants into any of your decisions anymore