Dusty is basically a lock. Durable, young and contracted.
Jack I think will struggle if they don't play a good amount of games this year (IE another 15-20).
Sheds will be fine, don't know what they're on about. Durable and fit. Will probably play until 35+ like Burgoyne.
Cotch I don't think has a change. Can see him making 260-280 max.
Caddy, Lynch, Prestia probably all a bit premature but I wouldn't have thought so. 250 should be their goal. Prestia will be lucky to get there IMO - probably more of a 220 guy.