Hi Karl,
that’s a beautiful Nightscape image. That area looks really cool. Much potential for interesting foreground objects.
I see one issue that comes from your blend: the mountains in the distance seem quite blue.
Your blend could benefit from eliminating the blue color from that mountains. Maybe I would burn the peaks as well because they are very bright.
What do you mean by that? Do you try to print the exact same jpeg that you uploaded here?
When I want to print my images, I prepare them in separate files. Most of the time I brighten them, resize them to the appropriate paper size, and add some print sharpening. Sometimes those print files look really awful when I view them on my monitor but they look good on paper.
Preparing images for print is a totally different topic. There are already some discussions about that here on NPN: