Here's another vote for the Smok Vivi tank.... Got mine working right on my first rewick (using cheesecloth wick and nichrome wire) Its a bit fiddly, but I know I can always fix any problems with it, unlike carto tanks...
I've got a couple smok DCT setups and its a PITA to get cartomizers reliable, if you get a good batch you're golden, if not you may end up flooding and blech. And if you end up on the other side where its too dry, you'll have to drip the carto to keep the top coil from burning. Sure there are single coil cartos... But its still going to be luck of the draw that you have a match that this carto works great with this juice/