I've never played a Javazon before so I thought that I would give one a shot. I'm only through Normal at around level 40 but lightning fury destroys. It has its problems though: it is mana intensive, I always have to go back to town to get more javelins, and it is nothing special against a single monsters. However, in areas with large crowds like shenk, or Baal's waves it is monstrously, laughably OP.
I know this is old news to everyone else but I'm new to this and I thought I would share because it makes me smile watching crowds simply melt away with a few javelins.