There is no way to predict how another goalie will do. Just look at the Hawks when Darling came out of no where. If that didn't happen they would have one less ring.
I am not pinning the series on anyone. When you give up 6 and 5 goals it is pretty hard to blame the defense. It is 3-2 with Rangers at home. I would call that pretty even.
Darling is good but he's no Price. Hawks did not need excellent goaltending to win the cup.
Just look at the numbers I posted and you could see exactly how other goalies performed so far this postseason. The only other goalie that faced the same qty of difficult shots as Hank will win the Vezina this year and was scored against 20 times in 5 games for a fancy .883 save %.
The Rangers D is not in fact terrible, but the deployment is. When Staal and Holden are playing 3rd line minutes (not coincidentally they did in games 3 and 4) the Rangers play much better defense. Sadly, sometimes old habits die hard.