I'll give you one tip: it's not done with masking, no cutout of the model and then simply moving it above the background. It's not done like that. (Although some people can create amazing art doing this..)
This is one of your best lately. No doubt about it. What interests me the most is the quality - is is superb. I _was_ asking you for more groundbreaking experiments - now we got it. Looking forward for more.