Drone Flies Into Path of Helicopter

....hard to tell.

You have the whole range from "nothing" to "crash/death" - all depends how/where/how big/speed/initial damage.....
Yes, the rules in NZ are, unless landing - 1000' above the highest obstacle over built up areas. 500' elsewhere. For aerial work, agriculture application etc helicopters and fixed wing may fly below 500' down to a height appropriate for the job, in many cases almost ground level. Many military flights train below 500', in NZ civil airspace, clear of civil low flying areas, 250' (FW) and 100' (RW), i.e. most of the country.
Depends on the lcl rules - in most countries there is a rule that you can go below "numbered" rules, as long as you don't put any 3rd party in danger....
So who has the "right of way" in this situation? If the drone is under 500', and the helo is legally below 500'? And I'm not necessarily referring to this situation.
It will HAVE to be mainly on part of the Drone operators (...pilots they are NOT!) - damn things are too small and too hard to spot in midair from a helicopter.....