It depends on the effect, style and location.

For our normal effect/style I use two strobe lights with soft light fitting about 4 metres or more away from the models and set high. Then for a floor light or pussy light I use one light low with a soft box.

Then for a side light I usally use a light high and shooting it through an umbrella.

Sometimes use a normal camera flash on the camera to work as a trigger for the other lights, this softens any harsh shadows.

We are shooting film and digital for boy girls sets.