On the loosies, if they want a smaller Ardie then that's Kirifi. If they want a Jacobson ruck and tackle guy it might be Blackadder. They don't know themselves what they want at 6, but Casey and Barnes fit the work rate plus love of contact.
I wouldn't pick Harkin. We already have Love, McKenzie, Jordan, Moorby, Beauden, Jordie who can play fullback - admittedly too many of them might be in the top side, but Proctor has played there too as emergency cover. I'd rather they picked a 10 in Kemara and had BB play 15 midweek - that gives a more similar feel to what they are trying to achieve with the top side to me, and the midweek team needs to play the same style if we want players to step up smoothly.