see, there's the hole in your theory. i'm not gonna re-school you in electrical calculations, but ohms law is simply the rudimentary formula, not taking into account efficiencies, and limitations. the main process here is a voltage drop across the circut. the stator will only produce about 8 amps @ full output, while simotaneously staying within useable voltage minimums. it will not put out the 15 amps above 10.5 volts, and infact, the many inefficiencies in the circut will drop the voltage to around 2-4 volts, with the rest of the energy being dissapated as heat, and transient fields.
you do not apply amperage, you simply allow it to pass, as it is a volume, and voltage is the pressure, which can only be built in the prescence of volume. no electrons=no voltage.
besides, if you could get 335 watts @ 22v, then you could just pair your lights in series, and run 4 80 watt 12v lights off the stock stator.