I haven't done it myself, but I know how I'd go about it. Skull White Primer, Baal Red Wash. Done. There's an Example
here. If you're not convinced, try a Second Wash. That should give you as bright a Pink as you need.
Simply, this is the fastest Pink imagineable, and it's perfect for Robes. You can get a good idea from that Example.
Good Luck, and Happy Painting!
Popsicle