Interesting thought that someone else has probably had, but I haven't seen it posted here. How do people feel about targeting JG Pageau from Ottawa and playing Brassard on LW? I actually like that idea, you get your long term 3C who can play heavy minute with Pageau and you also get a pretty clear LW upgrade with Brassard. I don't know what it would cost for Pageau, but I can't imagine it would be too crazy expensive. Rust for Pageau may make a good amount of sense.
If that doesn't float your boat, Rust for Bjugstad may also be an option that works. Bjugstad had a really good season last year, I'm surprised to see he finished with 49 points and really good possession stats while getting more Dzone starts last season.