Reread what I said. If it stops the enemy from attacking me for even a moment, it shows SOME potential of being useful. It doesn't work on enemies like Mini Dragon and such but why would you even need to use it on a boss? You're not tanking so it's utterly useless against anything but normal monsters and other players. Which of course, without the duration increase, makes it a less useful anyways.
Edit: If I am not the only person to advocate Mages and say these things then apparently Outspark isn't doing their job right and that we're all in agreement that Mages need some serious improvement.
Hybrid Mode
