Lehner. But it's close. He is under contract for 4 more years while Fleury's is up next year.
His numbers and record are tied to Vegas, which is an incredible team in a generally weak division. Deboer rotates his goalies regardless of performance and his division is weaker, often facing the sharks, kings and ducks as well as Arizona. The blues suck this year too and Minnesota is hot and cold. Colorado is the only other dangerous team Vegas faces.
Carolina is a good team too. But Nedeljkovic is a guy who won at every level and just got his shot while Mrazek is injured and ran with it. And Reimer hasn't been traded yet.
Look at the teams schedules moving forward. Do you want to face Tampa, Florida and a surging Nashville a bunch of times? While having nearly 0 games against Detroit and Columbus? Or do you want a schedule full of sharks, ducks, and kings? With only 2 games against the other top team in the division?