Fast is doing the same exact thing he has done every year, he just has a few more counting stats. That is a produce of getting top line ice time instead of only 3rd or 4th line.
Strome started to produce last year, before Panarin was ever in the picture. He continued to produce this year, while NOT playing with Panarin. Since being placed on a line with Panarin, there has been a visible effect on his numbers. BUT, Panarin is on pace to olbiterate his personal records. Something that no teammate in Chicago or Detroit can have an effect on. Strome is top 5 in primary assists. Should he be penalized because Panarin is putting them in the net? Does he get no credit at all?
History has shown you that it is not as simple as "ANYONE can produce with such an elite player". Or that ANYONE can create chemistry with such an elite player. To simply marginalize Strome and persume that Chytil would do even better is disingenuous.