We cannot give you an answer on how many puffs a cartomizer lasts or how long a cartomizer lasts. The “puffs per cartomizer” estimates have proven to be highly inaccurate. How long a cartomizer lasts is dependent upon how full the cartomizer is, frequency of use, and how long each drag lasts.
Some people top off their cartomizers, which means they add a little bit of juice frequently, so there’s no real clear moment when a refill is done. Other people vape until the cartomizer tastes a bit dry and then they add a lot of juice (we don't recommend that, but some people like it). The first fill of a Vea cartomizer is 1mL. Subsequent fills are a little less than that.
Because all of this is unique to you, we recommend trying a few cartomizers and seeing how long they last you.