No one can accuse the Ottawa Senators of being unable to complete complex transactions. If we learned anything during Friday’s drawn-out three-way deal with Pittsburgh and Vegas, it’s that the salary cap hurdles aren’t too much for Senators general manager Pierre Dorion to handle at a time when he’s a motivated seller. It took some perseverance. The NHL rejected at least one attempt to register the multi-faceted trade before the parties finally sorted out a transaction that grew to include four separate deals. The end result saw Ottawa ship Derick Brassard to Pittsburgh for futures: A 2018 first-round pick and goaltending prospect Filip Gustavsson. The Senators also received defenceman Ian Cole, who immediately became a candidate to be flipped elsewhere before Monday’s 3 p.m. ET deadline. Pittsburgh’s tenuous cap situation made the transaction considerably more complicated. It required the Golden Knights to be brought into the picture as an intermediary, with Vegas first acquiring Brassard and then retaining 40 per cent of his remaining cap hit while shipping him to the Penguins. That will cost Vegas in the neighbourhood of $1.9-million in actual salary through the end of next season, and they were rewarded with a 2018 fourth-round pick and gritty winger Ryan Reaves for the trouble.