Hi Happy. The only upgrade I can see with the Aspire Atlantis would be to get a mod that powers more wattage so you can build to lower ohms in the coils. I know the Atlantis V2 has .3 ohm coils so the 30W will not be enough for lower ohmage. With the .5 ohm coil and the 30W you're pushing the mod to max or close to it every time you vape. I would suggest a 100W mod so you have some headroom when you start with lower ohm coils or builds.