In their most recent game, Friday December 20 against the New York Rangers, the Dallas Stars played 17 minutes on the power play and were outscored 1-0; only the third time since 2009-10 that a team had that much time on the power play, and the only instance in which a team was outscored with that much power play time. That toothless showing was the low point of what’s been a frustrating power…