I truly tried everything I could, but I know the timeframe has been short.
So maybe now is a good time to try 'patience'.
Im not staying to stop what you are doing. But maybe stop taking such a hardline 'the R is dead' stance and just focus on being the best dad you can for your kids and on getting yourself healthy again. Let W do what shes going to do for a while.
This time you have is a gift, even though you dont see it now. Dont rush through it just to get to the end faster.
I agree with patience. Focus on yourself, your physical, mental, and emotional health. Now that you are separated it should be a little easier to do that. As far as the D process, take your time and make each decision deliberately. I'm not suggesting outright delay tactics, only that you do not need to be in a rush even if the W is.