I think 6mg is not enough for me because I get used to the throat hit after vaping the same juice for a little bit, but 12mg is too much. How should I go about making my juice between 8-10mg? Do I have to buy 2 bottles of whatever juice I wanna get, 1 with more nic, and mix I'm guessing? Which 2 mg's should I mix to get to that level?