I'd be looking at Herman and Jed ASAP. Three and two years respectively. Ashworth is worth an extension too imo. 

Agree, think Herman is a definite must along with Cartwright, but as you say also think Ashworth would be worth an extension too. Both Cartwright & Ashworth have suffered a little with  injuries but would say theirs have been mostly caused by poor/mismanagement of the injuries and also coming back too early before full recovery again due to the poor state the club was in staff & squad wise.  

 It think we just need to be a bit cautious about Jed's injuries he picks up a few knocks. It's also less risky to not offer him a deal early as aside from getting an NRL offer he won't ditch playing for his Dad.