I'm in a similar position, and have offered Benn and Semin for Giroux and Eriksson. I thought that was a pretty fair offer. He is mulling it over. You may want to try something similar.
I'll let you know how mine works out
Mooseheads: 14 team H2H (CBS)
+/-,G,A,DG,DA,PIM,PPP,GWG,GAA,SPct,W,
Dress 8F,4D,2Gweekly,roster22,3Gmax
F:Benn,Tavares,Backstrom,Galchenyuk,O'Reilly,Kuche rov,E.Kane,Radulov,N.Foligno,T.Ennis,Lee,Hartman,T ,Johnson
D:Weber,Burns,Werenski,Vlasic,Theodore,Severson
G:Bishop,Fleury,Mrazek