I will answer this question the best I can. I am still learning, but I also will state that I will always be learning. So this is how I am taught to look at lighting:
You are lighting a scene, not the actors. Start with your master. Light the scene how you see fit.
When you go into tighter shots use your master as a reference and light it accordingly.
The more control you have, the better your film will look.
For exteriors this is the same, the more control you have the better.
There are different views and styles of how to light day exteriors, but this is how I do it: backlight everything. Shoot your wide backlit. Get a shallow depth of field on your closeups so that you can move your actors to be backlit. This will keep everything consistent and keeps everything under control. Shoot at times that are good for lighting such as before 10 am and after say 3 or so pm. Backlight looks good as well.
There are some people who disagree with this style, they want only naturally motivated lighting. But it looks good and your audience wont notice unless they are trained to notice.
I hope I answered your question, if you would like me to elaborate on anything or if I missed something just let me know.