I would rank them in the exact order you have. Carlson is at the top and will be for the next 2 to 3 years.
How many total keepers?
My league is points only, with no cap. We carry 8 defensemen, but only 5 score points. We can keep any combination of forwards or defense. Please rank the below for long term.
Carlson: how much longer can he put up 60 to 70 point seasons? Will we see a sharp decline or will he age gracefully like Suter?
Deangelo: was this year for real or is he more of a 45-50 point guy? There were rumors of him getting traded with Trouba and now Fox there.
Hronek: I see his name mentioned a lot, but don't know what his ceiling is. Are Seider or Cholowski big threats to him?
Pionk: Will he keep his spot on Winterpeg's top pp?
I would rank them in the exact order you have. Carlson is at the top and will be for the next 2 to 3 years.
How many total keepers?
Carslon
DeAngelo
Pionk
Hronek
this is next 1-2 years, after that:
DeAngelo
Hronek
Carlson
Pionk