Sidney Crosby and Evgeni Malkin are both hot. Crosby has scored 14 points in his last 10 games, while Malkin has notched at least one point in five straight games. The Penguins' offense is better, too, now that they acquired Jason Zucker. The Penguins can take advantage of Montreal being without its best defenseman with Shea Weber out with an ankle injury. 
The Penguins were held to one goal by Tampa Bay on Thursday. Prior to that, though, the Penguins had scored 15 goals in their last three home games. 
Montreal is getting to the desperate point. I don't see the Canadiens playing a conservative game here when they've managed just five goals in their last three games. Before that, Montreal had averaged 3.6 goals in its last five games.