I would say he is Skyblue Yellow Face 2 Spangle Opaline Greywing.
You can't have a Green Yellow Face as Yellow Face is recessive to green, so it would just be a green bird. The YF causes yellow to show on some of the blue causing a green colour.
A green budgie is actually blue with yellow covering the whole bird making it look green. A blue is one with the yellow removed, and the various yellow face varieties have the yellow returned to some degree.