It helps to pay attention to the actual color of the sky and the sunset, as I found out tonight. As I was looking, I figured out that the majority of the sunset was blueish. Therefore, I chose to diffuse the monolight without a gel or a black/gold reflective umbrella and just adjusted the WB to shady. It really warmed up the flash. However, I used a speedlite to create a rim light and it was too blue, so I used a 1/4 CTO on it.
This was one of the test shots
also, constructive criticism is much appreciated