I think that's smart. As Benji said, his body is still getting used to the pressures of playing week in week out in the halves. Don't want to risk a bigger injury.
I'd treat this trip to NZ as a bit of a camp, putting trust in some of the younger team to step up. I'd even contemplate resting Api, even though that scares me.
Basically, I want Doueihi and Api ready to dig in on Easter against Eels, and if that means missing an international flight and letting the next gen step up, I'm open to it. So spine would look something like:
1. Bula (needs to be more involved)
6. Andrews
7. Madden
9. Hope/Haywood
Might be a lot of learning, but could pay dividends in the long run.