Correct, operational base is BKK.
For one, you won't have the legal right to live in Thailand, but will enter on GENDEC.
Two, it is a commuting contract, you travel for free on NLH.
Three, you also have the opportunity to have your off-days at an outstation (i.e. for example Oslo).
In effect, you will to some extent start and finish your duty in Scandinavia.
This is even more so when the airline is to expand to the west rather than to the east, out of Scandinavia.
This is one of several reasons that I think there will be a Scandinavian base in the near future (near = within three years).