This would be my method without knowing what opening day rosters will look like. Assuming NHL experience gives them a better chance of making the opening day roster I would send down Conacher, Brunner, Vatenen and/or Barberio.

Games Played in NHL

Craig Smith (72)
Justin Faulk (66)
Kyle Palmieri (28)
Simon Despres (18)
Mark Barberio (0)
Sami Vatanen (0)
Damien Brunner (0)
Cory Conacher (0)

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ESPN - 12 Team H2H Keeper League, 25 Players - 13 Keepers
(G, A, +/-, PIM, PPP, SOG, GWG, W, GAA, SV%)
Keepers
C: Tavares, Benn, Stepan
LW: Galchenyuk, Parenteau, Ryan.
RW: Brunner, Conacher.
D: Pietrangelo, Subban, Schultz.
G: Price, Dubnyk.

ESPN - 12 Team H2H Keeper League, 24 Players - 10 Keepers
(G, A, +/-, PIM, PPP, SOG, PTS, W, GAA, SV%)
Keepers
C: Duchene, B. Richards
LW: Skinner, Ovechkin,
RW: Ryan, Eriksson
D: Subban, Shattenkirk,
G:Halak, Quick