Ascension Puzzle

This picture is just beautiful, but it should never be put in a puzzle!!!!!!!
We do puzzles a lot and consider ourselves very good, but this is the hardest puzzle we have ever done. If we didn't like the picture so much we would have tossed it long ago. We still probably will end up tossing it as you can't be sure if a piece is right until you can't find one to connect to a group. Just too hard and frustrating!!!!!