Since the Cowboys finally got around to signing Lamb (finally), I think this would be a good time for the Cowboys to begin shopping Parsons. We have him with 2 years left. There are many teams, like the Bears, who would happily fork over 3-5 first round picks for him. We need all the picks we can get for him to try to build.
I think we are entering a time where, after this season, we will be rebuilding and will be giving the next QB a top WR to work with. I don't see how we can allocate a ton of cap space to Lamb, Parsons, and Dak. I think Dak likely walks after this season. As for Parsons, I think the smart thing to do, cap wise, would be to trade Parsons to teams like Chicago, LA Chargers, LA Rams, Denver, etc who will probably give us enough picks to basically turn it into a mini-Walker deal. This will basically allow us to do what we do best (draft) to build up an elite team in the future. Plus, we'd be able to draft a QB who will have a solid secondary, a top WR, a great oline, and a load of picks for the next coach to work with.