I would be shocked if Josefson was sent to Rochester. Very unlikely. I also think Deslauriers will make the Sabres as the 13th forward, but he's a little more likely to be waived.
Ultimately, the Amerks veterans to start the season will likely be Griffith, Porter, Fedun, Falk, Tennyson and Paetsch. They also have Andrew MacWilliam and Conor Allen who are both veterans. Sending an additional vet down like Josefson or Deslauriers would create a bad situation and I doubt Botterill does that.