DE are awesome. My Wych squads always have two HGs. The Hekatrix has a Venom Blade. My only problem with your rendition is that she's not showing enough skin. After all, Wyches are part gladiator, part exotic dancer, all blood bath. Love the mask, though. My favorite head to use. Wish I had more.
Also, Daft Punk would be former techmarines turned worshipers of Slaanesh. Tech-Noise Marines. *shudders at the possibilities*