This is entirely too overpowered... Basically it's impossible to kill one of these people 1v1 if they don't WANT to die. It's like a 1 in a billion shot of tracking them with JoAT. AoE's and fields simply don't reveal very much. By the time you can cast a second time they're stealthed and long gone anyway. Basically, if you play a ninja and aren't the worst player ever, you never die and it's lame as hell.