An asterisk next to Luke Whitelock's selection only for the initial camp in Christchurch starting on Sunday indicates he will be one casualty, with the other probably a shootout between Victor Vito and Steven Luatua.
Ongoing problems for Kieran Read may be another factor with the Crusaders No8 yet to return to action after his second concussion this year.
Luatua's claims will be helped by his ability to fill in at lock, his history with the team and the coaches' confidence they can find and adjust the details behind his flat-lining form. More experience comes with Vito, who can play across the blindside and No8 roles and is starting to hint he is getting a more complete grasp of his work.
The group will be trimmed from the 36 players named yesterday to 31 with the June 1 announcement of the squad to play England. The casualties look like they will be a hooker, a lock, a loose forward, a halfback and another loosie or one of the midfield backs.
Recalled five-eighths Colin Slade may remain because of his utility value while rookie hooker Harris' continued stay will hinge on his impression in the camps and in the Chiefs' games with the Hurricanes and Waratahs before the test window.
One of the younger halfbacks, Tawera Kerr-Barlow or TJ Perenara, may be at risk and Jeremy Thrush looms as another casualty because he is needed only for the second training camp in Wellington.