Regal, either you have a dud. Or your expecting to much. I own and use a VTR daily, always with protanks, all have the aero base upgrade! And usually a 2.5 or a 2.2 ohm coil, mostly 50/50 juices, and I am happy with the outcome. If your trying to achieve clouds like the kiddies blow on you tube, you won't get it unless you use a rebuildable type device with a very low ohm coil, not sub as the VTR won't fire subs.
If your in Colorado stop by and will get you fixed up, or find you a device you enjoy