STL obviously has a lot of talented players, and Oshie and Berglund have already been linked to the B's in various reports, but I don't see either ARI or VAN as great trade fits for the B's.
Arizona has Vermette, he is a good defensively and at the dot, but gives you more offense than Campbell or Kelly. Other than that, the guys I like on that team (OEL, Hanzal) are probably not going anywhere. Don't see Yandle in Boston either. Maybe as a UFA in a few years?
VAN is an even worse fit than ARI imo. Benning obviously knows the B's youth and prospects and likely has some interest, but other than Kassian in a 3rd-4th line role, who do they have that would fit on the B's? Love some of their prospects like McCann, Horvat, Virtanen, but the only way the B's would be looking at those kids is if they had thrown the towel in. I'm sure Lucic would be extremely attraction to the Nucks, but they don't have a player (like Hall) that would be of equal value, that I see.