The best, I would guess would be the cig that gives you the most battery life, juice delivery, and least hassle. Although there are certain aspects each type of setup addresses, the best battery would be the largest one you can find, preferably a LiFePO4 setup, probably with 2 batteries to give you 6v. (LiFePO4 batteries last up to 2000 charges and have a higher output, with reduced density, compared to a standard Li-Ion which gets around 500 charges). The next part is only best depending on your style. If you want to try lots of different flavors through out the day, stick with dripping. If you like to vape all day without changing or adding more liquid, get a tank, probably a Dual Coil tank.