I'd rank Nolasco and Niese ahead of both Wheeler and Cole. I'd rank Nolasco ahead of most pitchers right now because he's winning like crazy and limiting his walks, finally. Unlike Fernandez, Wheller and Cole haven't figured out how to pitch in the majors, and both are prone to getting hit around. Between the two of them, I'd drop whoever has the worst matchup upcoming. The good news is there are several replacements available for both of them in most leagues like Duffy, Gray, Wacha, Walker, Salazar. I really don't see a huge difference between any of these guys. They can all be great or terrible. If you are about to add any, pay close attention to matchup.