Against NZ we would be better off with a 5:2 split on the bench so we can make sure we can bring on fresh forwards. We need the pack working as though every starter is going to get 50 minutes so we can increase the intensity of our effort. Strangely for a NZ team, some of their weaknesses are in the forwards (depending on who is available and who they select). But the only way for us to take advantage of that with the potential forwards we can select is for us to play out of our skins and at the sort of intensity that NZ brought to the WC semi. So, IMO, 5 forwards is a requirement.
That leaves two backs on the bench, one of whom has to be White to cover for Genia. So the backs selection has to incorporate the fact that we will have only one cover for 10 to 15. Fortunately our backs are reasonably flexible: Beale covers 10/15, AAC (Adam Ashley-Cooper) covers 11/13/14/15, Ioane covers 13, Barnes covers 10/12 and Fainga'a 12/13. So, if the rumours are true that the backline will be Barnes, Ioane, Fainga'a, Horne, AAC (Adam Ashley-Cooper), Beale, then who is best for the last bench back? Deans has indicated that he wants Barnes at 10 and "the lady's not for changing". So having Cooper on the bench, which would mean that Barnes would have to move one out may not be the desired choice in his mind. Therefore, White and Mitchell might be the surprise pairing.