I use a joyetech evic vt with a kanger subtank nano. .19-.21 occ new vertical ni coils work best. I am vaping at 500*. I am using holy terp mix best flavors so far. With a brand new coils I blaze through about a tank and a half then a tank will last me a week to ten days being medicated all day long. I have messed around with lots of ways to mix and vape and this set up is best for me and a few friends who listened the one who didn't is always complaining.