Test it "dry" - and fish it. Period! Everyone has a personal style, the MC just enables you to enhance/improve your style.
"5" delivers the most effect while casting, "1" the least. Your personal truth is somewhere in between the settings and depends on your requirements.
If you need some help - invite me to guide you with all costs covered.
Jetblack
ps. since I am in Germany, I am willing to pay 20% of the airfare myself
pps. Seriously. Test the reel (they are amiable) and find your own truth. As always with fishing - there are no strict guidelines. He who catchtes the fish is always right!