Will you expand a little on what you mean when you say you don't recommend supporting divorce at all?
If I'm the BS and am using LRT and in the protection stage, and if the WS shows no sign of ending the affair, don't you have to pursue divorce at some point, otherwise the WS thinks they can just string you along, right? If you don't, won't they see the BS as being weak and tolerating an open marriage?
In my opinion (not that you asked), yes. There does come a point where remaining in the marriage does you so much emotional harm that it is better to leave it, if the cheating spouse won't repent and come back to the marriage.
I myself filed for divorce after three months of my wife's affair, after she absolutely refused to end it, and kept lying to me, our kids and even her own parents about it. Ultimately, we reconciled, but I was fully prepared to go thru with it. In the end, it was the jolt that she needed, although I DON'T think you should do it just to bluff.