Why not just hold on to Atkinson until the offseason and then move him? I don't think trading him to Boston is a solution at all, they won't be willing to send back a player to replace him, and its not like we need more future prospects or picks at this moment.
A team like Chicago could have A LOT of interest in Cam once the playoffs are over. They will be strapped by the cap, and he's cost controlled for the foreseeable future. Why not package him and Anisimov for Patrick Sharp? Chicago is also going to be in the market for a 2C, too. This trade could work out well for both sides. Then re-sign Letestu, let him and Wennberg battle it out for the 3C spot.
Top 9 would look something like this...
Jenner-Johansen-Sharp
Foligno-Dubinsky-Hartnell
Calvert-Letestu-Wennberg