Id try to find a place for Matheson first. Someone can guaranteed take him and Dumolin is one of the best D men in the league. You can find a cheap replacement for Mayfield such as holl retained. I think Malkin and Letang contracts could probably be 7mil for 3 years. Heinen would be a little over paid (500k less is good). If you did everything in this comment would could probably have even more cap space: Around 2 mil, which would be used get a better player in place of Zucker. Possibly a trade Zucker for Pacioretty.