OK, I got to test my theory on how I thought it should work. Remember, this involve me thinking, so therefore its probably wrong.
So, I figured that I would like to have an aperature around f/8.0 for the correct DOF. So I metered with my L358 my Metz 45cl-4 til I got around f/8.0. Actually It ended up at 1/5th shutter and f/7.1. This is my camera settings for correct exposure on the subject. I knew that I should really pull in some good ambient light with 1/5th shutter speed.
So, my wife didn't like to stop on the album design from our last wedding to have her picture taken again. She says she's almost blind from the previous two weeks of playing with the "new" flash.
Anyway, the sky was almost complete black with a dark gray look to it (looks like it could storm). So, if I had a nice sunset I think the colors would really pop without making the subject look flashed to death.
I think the key here is to get the correct exposure on the subject but in the limits of the boundaries of the landscape.
What do you think?