+1 on the carto tanks, and kanger t3/mt3s for taste, and I still use smoktech and boge cart's without a tank, and instead of a tank, dripper, or clearo, or tortoise, airplane kazoo, twirly frobrisher, because sometimes you just want to say, 'Faff, f*** off, faff'.
As to the Aga T and any device that states that it is for advanced users, it isn't, as much as I love vendors, nobody in the vape world has the ability to create an instruction manual, I know, crazy, voodoo shenanigans, but their are many places you can find in forums such as these where people explain what you need to do, and a heap of helpful youtube videos as well, and if I can set up an aga t, which I did on my first go, anyone can, as I can barely tie my shoe laces without having an aneurism. Admittedly, it can take practice to set it up for great results, but what doesn't, apart from bacon sandwiches? I'd still have another device that you don't have to build to keep you going though, defo.