I wouldn’t be too concerned about the prison valvegear, one hour of sunlight a day and just the company of a three man rotating guard escort everyday for the rest of your life is going to be pretty nasty anywhere.Hmm, just on some superficial research NZ has had recent problems working out where to put violent/dangerous criminals as Auckland is the only prison with maximum-security facilities and the setup there is considered basically inadequate.
Releasing this guy into gen pop is an unthinkable idea for so many reasons so they will have too come up with a long-term solution pretty quick.
Perhaps they will work out a way to have him held at Goulburn while NZ builds a proper max facility. No doubt there would be some knotty legal issues but nothing that couldn't be worked out by putting the three relevant AGs in a room.
I will make an educated guess that there are more residents of the average big house susceptible to right-wing radicalisation than there are to Islamist radicalisation, and yet we have already seen the latter cause problems. Protecting other prisoners from this scumbag has to be done properly.