I started with LR 1.5 and I high drian 18650, but I have been haveing MUCH better results from a 5 ohm atty (got it from sweet vapes, great price and he tests them all), and 2 AW IMR 18350's. This setup has given me the best experience. TONS of vapor and flavor. The vapor is a little bit cooler than the LR atty (it was always super hot) and much more consistent for me. The batts straight off the charger hit really hard, but the majority of the life is just perfect.
I also vape 100% VG juice and this setup seems to handle it just fine. If you want your juice to flow a little bit better, add just a tiny dash of distilled water to your juice. I use about a ml of water to 30 ml of juice (that is only the super thick stuff) it really helps. If you use just a little bit and it is distilled water, you will not taste it at all and your juice will flow a LOT better.
Hope this helps.