If you've fought the A and outed it as much as possible and it is continuing, then indeed, NC during the Sep would be ideal...
I've not been very good at NC as of late, but when I did it for 3 weeks or more, it had a crazy effect...first, my detachment strengthened...I felt some power as well...
Second- W began to pursue- but this is not your goal...
The best thing to do while attacking the A is to do what Allen said- 0 emotional support, be the best dad you can be, and get busy w/ your life...
I agree w/ Pup about the letter- I did the same needy thing, so don't sweat it- the best thing is to learn from the mistakes of others...
If you can remember that you have great value even w/o W, and the your happiness is not contingent on her- in any way shape or form- you will be well on your way.