Daily or weekly starts makes a huge difference in this choice. Also who your two goalies are now could help us see how often you will need to use this player.
Weekly starts I am only interested in starters because you will never have enough faith in backups to start them over your top 2. Personally I am hopeful of Schneider bouncing back so I would rank them in this order for weekly: Schneider, Koskinen, Demko, Georgiev, and then Stalock. Demko/Geo could be interchanged but I am pretty low on how NYR will do this year.
In a daily start pool you can have a quality or quantity approach. That being said, none of these guys are safe bets for good sv% or statistics. I personally like to know i'll use them a lot and not just when they are playing bottom tier teams. So quantity I'd go with the same as above. Quality wise, I'd suspect all will struggle as none are on clear playoff teams. I'd gamble on them in this order from a end of year statistic point of view: Koskinen(big gamble imo), Demko, Schneider, Stalock, and then Georgiev. As I said above though, I am very low on the NYR for this season. I feel like from a quality point of view it is really preference as most people will rank these five differently for who will have a solid sv% and GAA at years end.