It reads like that Ninja ability but is a Tank exclusive. It makes sense to be used on an off tank. But I don't think an off Tank in offensive mode can generate enough enmity for it to matter. It makes sense for a Healer or Dps to toss enmity to the Tank. Or better, if it took 25% from a target instead. Its such a specific situational trait was there any reason why this would be considered a use full for a tank in the current set up? Aside from putting it on that one guy that's been criticizing the tank.