I have no knowledge of the operating site or its obstacle environment but, if the NZ CAA requires it to be flown in PC1, we might make the assumption that it is contained within a congested hostile environment.
Flying out of any operating site in a congested hostile environment (in a single) puts the helicopter into the exposure area - there is no way to sweeten the pill.
A helicopter certificated in Category A may or may not have a helipad procedure; if it has, it could be vertical, back-up or sideways but it will be exclusively provided by that manufacturer for that helicopter along with the profile, obstacle clearance criteria and mass limitations - all of which have to meet the requirements specified in the certification or operational rules.
If there is any wind at all; flying backwards in a single would be the equivalent of a transition downwind (and backwards), followed by a further transition from downwind, through a zero-wind condition and eventually into wind - all undertaken inside the HV curve.
This would require more power than a normal transition or a towering take-off and might take the helicopter outside of its control envelope. On a risk assessment basis, there appear to be few gains but it does introduce number of unquantified (by the manufacturer) hazards - including an extended period within the HV curve.
Jim