booking class R
miles according to gcmap - about 24k
(depending on whether you fly from OSL or ARN or open jaw etc)
most airlines are not too generous with booking class R unless you are top tier with QR or AA
http://www.wheretocredit.com/english/qatar-airways/r
So,
unless you are top tier with AA or QR
or
you really want to go to NZ
or
you want to enjoy the (currently) longest flight...
you are getting about 6cpm (125%)