I just had a look on Zero Tackle at the players off contract next season and there doesn't appear to be much good talent still on offer. Of what is still on offer I would be interested in us signing Pangai Junior, Oates, B Morris and Hetherington. Oldfield could offer us a bit of speed on the wing, but I am not completely sold on him.
We should already be looking at who is off contract at the end of 2019. Players I have identified who would be on my shpping list are Rapana, Kikau (if we signed Kikau, I would then move Frizell to prop), D Walker, Tom Wright, Asofa Solomona, Munster, Hess (to play prop), Sam Burgess, George Burgess, Tom Burgess.
PS I doubt that we will sign any of the players that I mentioned in this post, besides maybe B Morris, but he will probably end up at Easts. Oldfield would be another that we could end up with.