I am about to shoot a commercial next friday. Blue chroma and a talent. The director want a soft lit all over the talent. I think this set up: 4 spacelights, 4K each, to lit the chroma and create a nice ambient light. Then add two 5k frensel through silk to lit the talent (both 45°). And two 2k with 250 for the backlight (maybe with plus green), so i can have some light in the talent´s shoulders.
The talent moves so i have to lit he for every angle.
This is the ref:
http://motionographer.com/2009/01/23/bns-office-max/
And some thumbnails of the ref