The outlook for Wednesday is more promising but teenager Josh Clarkson is away for the U19 World Cup cricket campaign, with Napier's Christian Leopard and Nelson's Felix Murray, while Taranaki's Jordie Barrett is a non-travelling reserve.
NTOB batsman Indika Senarathne, who is at the National A competition in Christchurch, joins the Stags tomorrow for training in the hope of boosting the top order.
While CD have 18-20 players in a squad for such cases, Malan said the long-term goal was to have a catchment of about 30 to counter the loss of players to other honours or injuries.
While "we have a fair way to go", he said they had identified aspects of the game where coaches could manage structures to ensure 20 players would keep each other honest.