Is it length of vape, or density that you're looking for? You probably want something like the istick 50w and a subtank
tank, that will give you much more vapor.
With me anyways, I can drop to 11w and take a long slow vape. Or I can go to 15w (on my rebuildable built to 1.5ohm) and take a quick dense vape. The quick dense vape has more vapor and to me is more satisfying. So it really depends on what you're looking for.
I wouldn't go with a mechanical unless you're building your own
coils because using pre-built
coils will only give you 1 or 2 options in vapor. With a vw device like the istick you can adjust the electric strength and find your preference.