Hand Saiko, Hamilton, and Porter blank cheques and tell them to write in what they think is fair. Core players.
Sidra, Surprenant, Semenets, Monsalve, and Rago seem worth keeping. Parker might be depending on how he's recovering from his injury but I'd rather have Monsalve in any case.
Depending on his salary, van Leerdam might be worth holding onto but he's hardly a superstar at this level.
Cut Smith, Baart, Antoniuk, and most of the fringe guys.
The rest? Maybe worth holding onto but replaceable. There are guys like Yamada, Jonke, and Saler who are likely to be good value contracts but are hardly first-class players; still, if you can find somebody better on the market don't hesitate.