Well, the thing that would offer you the most options for absolutely anything you could think of to put on top would likely be a mech mod, with an optional kick... I think I'm using the right terminology. I haven't been looking at mech mods much, as I don't have the time to truly tinker with them. I can't even find the time to learn how to rebuild a Protank coil at the moment, although I'm saving my burnt ones for when I do. With a mech mod, you could go into subohming, and if you add a kick you'd have a regulated device.
I have been doing some serious reading on mods and know I have a loong way to go before I get to that stage of the game. But the thought of a Magneto or a Vanilla with my own built, Russian, Ithaka, or Immortalizer on it just makes me giddy.
