I've recently brought a nemesis mod looks great in 18650 and 18350 modes. Only thing I can recommend is get recognised batteries and do your research on here. I found a great iPhone app called Mr combis ohms law if you can get it. Can tell you straight away what wattage your vaping at and if your stressing the batteries you've selected to much with the amps.
As for an RDA, I'd recommend a plume veil nice and easy to start on and looks the nuts with the nemesis if you get a black one, also in 18350 mode it nearly fits in your palm - great for stealth vaping.
I tried dripping and it wasn't for me, so I stuck to my kayfun, works equally well on the nemesis. !
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