Here is a recent portrait I shot for a co-worker. SB28 behind and to camera left set on 70mm at about 1/2 or 1/4 power for a hairlight. SB800 to camera right in front of subjects shot through 45 inch umbrella at 1/32 to 1/16 power. Didn't write down my flash settings. (sorry) Trigger with pocket wizards and shot against black backdrop.