The placement of your light in an "artistic" mode is strictly up to your artistic tastes and your vision. For my personal taste I prefer the use of one light and I direct that light so the shadows will fall where I want them to according to my vision.
I'm sure you've done your researchb but check out Doug Lesters portfolio for a variety of lighting techniques.
Two lights. Main light (soft box) just to camera left 6' up and 25Âº down angle and hair light with grid 9' up and 45Âº down angle. Due to the difference in texture of the two lights sources, there is a 1/2 stop differewnce between the main and Hair light. There was no fill or reflector used to the right of the model.