Kosi back + ruck relief is worth a shot IMO, although maybe not ruck relief so much until either Grimes, Gibcus or Young is fit and playing alright.
Cumberland I think should be playing high forward.
Brown, would like to try him forward. A great kick.
Balta has to play backline unfortunately but I'd love to see him on the wing.
Short, maybe also half forward flank, good kick for goal and seems to struggle in defence under pressure.
Broad maybe on a wing?