St. Louis was the better team over Edmonton last year. Losing Perron hurts but Thomas and Kyrou should take another step this year. Plus Binnington has shown he can get hot and steal some games in the playoffs.
Edmonton had a solid offseason, but literally the only thing they actually did was upgrade from Smith to Campbell, plus they now have a ticking time bomb in Kane in their locker room.
Assuming Vegas gets completely healthy, they're still a big threat. Now that's a big if considering Stone has been held together with duct tape and Eichel is a question mark, but they'll have a full year to develop chemistry. Plus they just upgraded their coaching from a mediocre coach to one of the best coaches in the league
Assuming every team is completely healthy, Vegas > St. Louis > Edmonton would be the next best 3 teams.