If you have a crap ton of wire you may in fact need that many watts. I maxed my
sigelei 100+ on a 1 ohm build. While it was only 70 watts, it was 8.4 volts, so it wouldn't go any higher. Still not sure how that build loved the power, but is wasn't even that warm really. I only tried it that high for gits and shiggles, but somehow actually fell in love -_-