New tremor totems are awful...

[Dominian]

Duel isnt a good idea, your other shaman cannot heal someone dueling so I would suspect their pulses of Tremor would not affect as well. You need someone from opposite faction to do it or find a mob that fears, a lot.

Good point. I think I know someone on the other side with a few priest. I'll see if I can't set something up.

- Souca -

You can also do this in the Nagrand arena or Blades Edge arena..

According to certain people tremor was FIXED not nerfed, apparently it ticked each second. However i do not have any blue posts to back this up..

I have my doubts that Blizzard wants us to be impossible to fear, so if it ticked each second then yes it was kinda insane.