No trades left not sure who to start or Captain

[l_dub51]

Backline : H.Shaw, Lake, Waters, God, Birch, Suck, Lids (Hargraves / Darley)

Mids      : Ablett, Swan, Priddis, Kennedy, Boyd, Cotch (Zaha / Sexton)

Rucks    : Cox, Giles, (Redden / Staley)

FWDS   : Danger, Buddy, Roughy, Stevie J, Beams, Sidebum, Zorko (Dusty / Tippett)

This is how my team is currently set up.
Not sure who to start ruck (Roughy / Giles) and who to start forward (Zorko / Zaha / Dusty)
Any advice would be appreciated can take criticism, and yes i'm a relative noob at this so have zero trades left  :-[