What should the Black Caps do about their batting line-up?

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New Zealand's batsmen face a couple of days of serious soul-searching - and in one or two cases hearing some bad news - ahead of the decisive third test against Pakistan starting in Napier on Friday.
Right now New Zealand are operating as two distinct halves, and their bowlers are being badly let down.
All the problems lie at the batsmen's feet after Pakistan romped to a 141-run win at the Basin Reserve in less than four days to square the series.
What should the Black Caps do about their batting line-up?