Not sure the T Rex can be replaced. He's one of a kind.
I think they'll be concentrating on keeping their current squad together the best they can, which looks good chance now. If they keep Stewart and Ballin the spine is set for a while and that's the key. They've got some tidy youngsters, especially the halves, and picked up that u/20's kid from Canberra who is said to be good. Jorge Taufua has signed so they've got the ball rolling.
If they look anywhere outside in the next year it would probably be front rowers depending on what Lussick does. Manly have been rumoured to be after Shackleton so not sure if that's a hint as to the type of player they are looking for from outside the club.