Goaltending certainly but the Oilers have a very good and very deep defence. If the goalies stop what they should stop Edmonton is fine.
I'm confused by Vegas, honestly. They've had almost nothing going at 5v5 the whole series. For a team that I thought was deeper than Edmonton they've been getting killed by guys like Evander Kane, Adam Henrique, Corey Perry and Connor Brown. McDavid and Draisaitl haven't gone supernova yet but by and large they haven't had to.
This is the weird one to me. I thought he might as well have been dead. I guess I just don't know enough about him because I don't know what he was like during the regular season. You could have told me he was retired and I'd have believed you.