That is an easy question for me, the Kings have a better chance of holding Vegas to 1-2 goals than they do Edmonton. They'll be heavy dogs in either series, but Vegas they feel more live.
Edmonton might be the worst matchup for the Kings in the entire league, the Kings just can't score goals, and it's impossible to stop those two from doing so, especially early in the playoffs when they are more fresh and can be double-shifted. Anytime the Kings even remotely threatened them they put those two out there and the Kings never had any answer. And the Kings just don't have the offense to exploit the other three garbage lines that result from playing them on one line.
Winnipeg would be the most ideal matchup for the Kings, but I don't see them falling to a WC spot, the Pacific teams behind the Kings are garbage.