Do you not have a competent police observer trained to help you in such situations,
Trained in the use of NVGs, yes, and cleared for the front seat, but not confined to it.
reading rates of climb/descent, rad alt heights, air speed vs ground speed, spotting incipient VRS,
They don't do that, unless things have changed since I left. I did consider teaching them to do that when doing their NVG training(being used to it in the Army), but decided it wasn't practical without a set of flying instruments infront of them.
Out of interest, whilst talking about night capability, are you allowed to operate on NVD down to a field site that hasn't been recced
From an Air Ambo pilot last week, they have to switch to white light for the landing.