Re: Faulk. The best player of the bunch, but might be in the toughest situation tonight. The Avs have been stingy all year and one might expect Faulk to be a minus tonight -> he leads the club in ES TOI but the Canes without Ward and Khudobin will go to Colorado (where they have never won before) and try to win it with either their third or fourth string goalie in the nets. If this isn't a lineup question, but an add/drop question, then Faulk is the Canes #1 d-man and he's the only one that has or will have that designation.
Krug gets softer minutes and PP time on a better team. Rielly isn't top PP and probably won't get too strong of a look at it until/unless a similar player in Jake Gardiner is moved.
It depends on what you're looking for exactly, but Faulk will log the most time and have the most freedom. Krug has a good team and gets soft minutes with good players and the team around him has limited puck skills on the back end, so he plays on the PP a lot.