Hi okjpc, there are two lines of thought on how we should pray for our WAS. Take a look at the Starsky prayer (on page 1 of this thread), which is a great prayer for those who are able to keep thinking about their spouses, and what may be going on in their lives.
The second line of thought is the 'Nitty prayer' (on the second page of this thread), which turns the spouse over to God, and to bless them. For me, the Nitty Prayer works better as I am also working on healthy detachment. Check them out and let us know what you think.