Napoli costs us a pick, but I think you could make a high AAV, short term deal, that gets him off the payrolll when Werth, RZ, and Desi / Stras /JZ get expensive. you really only need him around to see what you have with Skole. You also have Moore to step in. Granted, Boston is also probably going to offer short, high AAV, and incentives, but they are still closer to the tax threshold. You lose a little left / right balance.
If you really wanted to be viscious, why not McCann as a first baseman and part time catcher? he'd be able to make sure the unwrittten rules are followed.