I can't see Nashville parting with these assets for Giroux, even if he is worth it. This is the first time Nashville has come out smoking hot in the regular season and are putting up big offensive numbers. They have a coach that is working well for them and bringing out the best in all their young players. I can't see a GM like Poile, who has never made a major shake up, deciding that the first year their team is looking like a serious top tier team, unloading that many pieces to get Giroux. Maybe in the offseason if their offense hits a major brick wall, but even then I doubt it.
Obviously dumping Vinny, Umberger, AMac will be good, but I can't see too many teams willing to trade for them without us eating some of their salary or taking a bad contract in return. But if we can find a team, to even just give us a 7th rounder, then we should take it.
Me personally, I'd be willing to trade every roster player we have outside G, V, Simmonds, Schenns, Couts, Read. Coburn and Streit would take a fairly big return for me to move either of them too. Everyone else I'd deem is pretty much expendable. None of the players left will bring much of a return but it'd open up a lot of salary and lots of roster spots for next season.