To manage this the right way, Sullivan should be thinking Murray is his guy regardless of what happens in Game 6. The Penguins should live and die with Murray in this round. Because while Fleury may be ready, odds are he's rusty. The Penguins can't afford to have him shaking off the rust this deep into the series. They certainly can't afford it if they wind up facing a must-win Game 7.
Provided Murray gets the job done and helps the Penguins advance, Sullivan can re-evaluate the situation and potentially go to Fleury for the start of the Eastern Conference Final against the Tampa Bay Lightning. It would be a new series and a fresh start, so it would make far more sense than going to Fleury late in a series against the Capitals.
It's easier to let a goalie shed some rust in a Game 1, when the teams are feeling each other out and the series has yet to take on an identity. Even Fleury seems to get that. He understands the predicament he's in.
"It's all right," he said. "You know, we're winning some games, we're up 3-2 on the Caps, on the team that had the best record in the League. I'm just trying to cheer the guys on and be positive around the room and keep on winning."