Overall great song
Very pleasent sound! I love the way your transitions from melody to melody or from melody to backgrond are done - very smooth! It really does feel like a plum of smoke dancing in the breeze, travelling over countries and landscapes like none have been seen before!
I feel your build-ups are more inconsistent, however. Some of the build-ups are a bit quick (the one at 2:00 is amazing, though!) and could use a little tweaking. Your sample selection also becomes a bit repetitive over time, but then I've been listening to it for 15 minutes, which might explain a bit :P.
Overall, one of the best trance song I've heard on NG.