As far as I know the atomisers for the Kissbox classic are the same as the ones for the classic, they both have the same mouthpiece (that part is actually part of the cartridge that you can replace) and they both have the same battery thread connections. The difference with them is the batteries and switches.
Your shopping list sounds ok to me except you might want to get a spare manual switch too.
Cartridges can be refilled and reused. Cartridge filler can be washed with water when it gets manky after a few days. I have boxes and boxes of cartridges that I'm only ever going to squeeze the juice out of now because I only drip these days. On the other hand they are not expensive anyway considering each one contains about 1ml of juice. That's 5ml per pack. It's a bit cheaper to just buy juice but not much.
Your shopping list sounds ok to me except you might want to get a spare manual switch too.
Cartridges can be refilled and reused. Cartridge filler can be washed with water when it gets manky after a few days. I have boxes and boxes of cartridges that I'm only ever going to squeeze the juice out of now because I only drip these days. On the other hand they are not expensive anyway considering each one contains about 1ml of juice. That's 5ml per pack. It's a bit cheaper to just buy juice but not much.