He averages 34.60 in 17 tests as an opener compared to 37.10 overall. However, on the sub-continent that average rockets to 44.75 in seven tests, partly boosted by his 225 in Hyderabad during 2010.
"This is a horses-for-courses approach," McCullum said. "For us to have the extra bowling option [of another all-rounder], it was the best choice available. We've got six bowling options and go in with a better opportunity to take 20 wickets.
"Pakistan are going to be a formidable team in these conditions. Bolstering our bowling means one spinner [Sodhi] takes the ball away from their right-handers and another [Craig] takes it away from their left-handers. In addition to those options, we've got two bowlers capable of pitching it up and swinging it late in Tim [Southee] and Trent [Boult]. We've also got a number of left-right batting combinations in the [batting] order.
"I've opened before and had some success in the sub-continent. You do what's required to give the best chance of winning. I'm looking forward to batting with Tom [Latham]. He's an exciting young talent who's measured at the crease."
New Zealand XI: Brendon McCullum (c), Tom Latham, Kane Williamson, Ross Taylor, Corey Anderson, Jimmy Neesham, B-J Watling, Tim Southee, Ish Sodhi, Mark Craig, Trent Boult.
• Andrew Alderson travelled to the UAE courtesy of Emirates.