I think you should aim to get some solid, experienced B graders in for depth purposes and to protect the younger players coming through. Luke Dahlhaus, Cam Guthrie, Shaun Atley and Josh Thomas all fit the bill and are all free agents. You guys could offer them 100k-200k more than their current clubs to entice them. I'd have them on par with someone like Lyons in terms of ability and potential out put. I'd then offer Jarrad McVeigh and Richard Douglas deals as experienced veterans who can set a great example off field. That is 6 experienced players and you can then head to the draft with 4-5 draft picks all hopefully in the top 30 range and get in some elite talent. With one of those picks perhaps targeting a mature aged player who can impact straight away?
Potential line up assuming Lynch and Hall depart and Rosa, Barlow, Lonergan and Rischitelli are all moved on-
B Harbrow May McVeigh
HB Bowes Thompson Weller
C Guthrie Dahlhaus Lyons
HF Atley Day Thomas
F Ah Chee Wright Martin
R Witts Miller Ainsworth
I Swallow Hanley Douglas Fiorini
Depth chart of Lemmens, Brodie, Sexton, Young, Kolodjashnij, Powell, Scrimshaw, Schoenfeld, Ballard, Heron, Joyce, multiple top 20 draftees.
That best 22 line up is actually quite experienced and should be capable of putting in competitive performances week after week but it also has a nice blend of youth and with a stable, experienced line up like the one above you'd be able to substitute in players such as Brodie, Scrimshaw, Powell, Ballard and this years draftees and have them play a role and let them flourish/develop without them being relied upon to play a key role as Suns youngsters have had to in the past.