I think electro sky is a matte, and I like to apply it with a stiffer brush, and then blend it out with the 217. My favorite look with electro sky is kind of tame.
Sable: outer 2/3 of lid, (#242)
Mylar: inner corner and highlight brow (#224)
Malt: crease (#224)
Electro Sky: center of lid, just over the iris (pat on with #239, blend edges with #217)
The little bit of Electro Sky gives a flash of blue when i blink, so the look is still natural but a little something special.