Going through the list of GWS players that might be part of a salary dump
buntine (2 games this year, contracted til 2019)
deledio (0 games this year, contracted til 2019)
Mohr (1 game this year, contracted til 2018)
griffen (3 games this year, contracted til 2018)
Perhaps...
Carlton get Hopper + Kelly + Deledio + Griffen + buntine -> 2018 1st + casboult compo pick
GWS get Martin + casboult compo pick -> Hopper + Kelly + Deledio + Griffen + buntine + 2017 2nd round (effectively upgrades 2nd round pick)
Richmond get blues 2018 1st + GWS 2017 2nd round -> Martin