I have not idea any more. Gus could play two backs of four and wait for Coventry to hoof aimfully into channels until 20 minutes from the end. Or he could play Buckley (or Noone) and Lua Lua from the start with Harley (or Noone) behind Macca on his own upfront and try and crucify them from the start!
My temptation would be to rest Dunk and let Hall have a go.