I have a tarot nano, and I like it a lot but I am a MTL vaper. You won't be blowing huge clouds with the nano.
There are tons of more sub0hm kits out and about, almost all two battery mod kits come with a sub0hm tank. You could consider an eleaf invoke kit, although the tank is small for a sub0hm tank, it is a sub0hm tank, with topfill. I would say just look at two battery mod kits, and then check the specs on the tank itself. The resistance of the coils and tank size will tell you how sub0hm the associated kit is, and the resistance options of the coil.
To be honest, though, I think you will find that many of the "beloved" sub0hm tanks, such as the Uwell Crown (original and 3) don't come in a kit, or if they do, you still may be better served by purchasing both items singly. I'd look for high wattage two battery mods that appeal to you, and some of the more interesting sub0hm tanks, like the Uwell crown. It gets great flavor and has lots of coil options, I don't think I've seen negative feedback on the forum at all, the users are satisfied. You could get a smok kit, but be warned some users have had difficulty with the coils, and the mod also won't perform well in TC mod. Reliable mod-makers include teslacigs, Vapresso, Voopoo, aspire, and several others. You could look into a DNA mod, but it will be pricier and unless you plan on using TC, perhaps not worth the money you'd spend on such a mod.
Best of luck and I hope you can find either a kit, or a setup that you think you will enjoy. You really are going to need a two battery (external battery) mod to really turn to sub0hm, as otherwise your battery life will be poor. For information and batteries you could go here:
Mooch's blog | E-Cigarette Forum
It will tell you what batteries are authentic, safe for you wattage, and good vendors. You'll also need a good external charger, which need not be ultra pricy.
Best of luck,
Anna