This may sound crazy, but hear me out. All four may be included for certain games, particularly if Astbury doesn't regain his spot (for whatever reason).
What if one of Jack, Lynch, Nank, CJ and Chol is always on the bench?
What if Jack spends most of his time playing higher, well clear of the two tall forwards? That allows Jack to be a great link man, and to give us greater aerial presence between the arcs.
What if, in general, the ruck that takes the centre bounce then drops back to fill the hole in defence, or at least stays a kick behind play? That would help counter the fact that we seem a tad short down back at present without Astbury.
Discuss.