I don't have delusions of netting Silfverberg from Anaheim, I think they move someone around and buy Bieksa out for $1.33m per for two years - the buyout window opens earlier of June 15 or 48 hours after SCF are over, so pre-expansion draft.
The clearest fit in terms of a team with an extra forward for me is Columbus. They are likely to protect:
F: Dubinsky (NMC), Hartnell (NMC), Foligno (NMC), Saad, Atkinson, Wennberg, one of Jenner / Anderson
D: Jones, Savard, Murray
G: Bobrovsky (NMC)
If there's a way to swing a move for the other of Jenner/Anderson + Savard for C. Miller, picks + futures (and/or NHL roster guys who don't need protection), I'd be all over that.
From a Bruins standpoint, I don't think it's wise to buy out Hayes. Sending him down would have him cost $1.25m against the cap for his final year, and they'd still have room to buy out Beleskey after next season (they wouldn't be able to if Hayes was bought out, since that combined with Seidenberg's buyout puts them at the max of 2)