Hopefully we'll keep what we've got but also Manase Manuakafoa would be a good addition as would Brent Kite who is 31 out of contract at Manly, an ex-Aussie international, both are big and powerful runners.
Think only a marque signing such as a very big powerful NRL prop/pack leader along with some real pace on wing/centre would really improve a quality squad that Agar has already built.
May need still to lose some that haven't really performed this season such as John & Southern to ensure a balanced player rosta.