Just one of them healthy and in the lineup and they get past Seattle IMO. Remember Cale was playing banged up too. He wasn't himself in the games he played, plus he missed one.
In the second round, they'd need a mostly healthy lineup, but I think Val would be the difference against his former team Dallas. I think he puts on a dominant performance and the Avs advance.
Only team I'm not sure the Avs beat with a healthy lineup last year is Vegas in the WCF, but who knows. The Avs definitely had the talent advantage, and the experience advantage of knowing what it takes to win, but the Knights played well, and had the hunger advantage having not won yet. Probably would have come down to goaltending.
If they get past Vegas, the way they handled Florida, I think a relatively healthy Avs team beats them to win the Cup again too, and most of the commentary here the last year is rendered moot.