Is this format better ?
VABB OMDB OSDI LGAV LOWW EGPF BIKF BGBW CYZV KBGR KPBI...
I do not know the range of a King Air, but in the North zone ( that I crossed many times on a Falcon10) we were planning for no more than 800Nm legs since the weather is changing very quickly.
Nassarssuaq is a breathtaking airport, but yes a bit challenging especially at the minimas; Kangerlussag (sonderstromfjord), is on a more northern route.
If you want to be on the safe side take the blue spruce and land on every rock ...
Regarding the Airway post; it just shows distance between fixes. All purpose of it.
Buy an Accukwik and negotiate with the handlers.