What worked last year in Origin III was Murray starting at lock with Yeo on the bench and Moses 7, Walker at 6 (MOTM).
I agree that with Souths back in some form, Mitchell, Walker and Murray teaming up would be a good fit. But they won't drop Luai and Mitchell's commitment is in question just because he said he's worried about his club. I thought they all say they focus on club footy and rep footy then takes care of itself. Do any of the other players declare that they put Origin ahead of their club? Seems a bit excessive.