I have similar views but I think the tactic will be for Markovic to follow Ryder into the ruck while the main ruckmen are resting. From memory he did a fair bit of ruckwork for Willi.
Just a side note - I think Hill will be the Sub
Thats a real concern if thats the plan. Ryder is far to mobile and will destroy him around the ground. Surely Markovic will just be played as a stopper at FB.
I still don't think we can have Stack and Hill in the same team. Having 2 players who lack any intensity at all will make things tough, hopefully Stack can turn it around but I'm not holdiong my breath. Sooner we get Gilbee back the better.