"So the selectors have got to get pretty clever here. Jesse's not getting any fitter, so they've got to make a decision on his behalf as to what form of the game he's going to focus on."
Northern Districts batsman BJ Watling filled in at No 5 during the one-off test with Zimbabwe, which New Zealand won by 34 runs, but he did not set the world on fire and Crowe speculated he was only taken on tour as a back-up wicketkeeper to Brendon McCullum and Reece Young.
"I think Daniel Flynn is a far better No 5 in the country as a back-up behind Jesse," Crowe said.
Otago's Neil Broom also scored plenty of runs in the Plunket Shield last summer and has never been given a chance at test level despite averaging 42.89 in domestic four-day cricket, with 10 centuries.
New Zealand travel to Australia this month for a four-day tour match against Australia before two tests in December against their transtasman rivals.
Crowe said the acid would go on the batsmen to turn their starts into big scores to ensure New Zealand had totals they could bowl at with their limited pace attack of Tim Southee, Chris Martin and Doug Bracewell.
They return from Zimbabwe this week and will play the second round of the domestic four-day competition for their provinces.