I use WotF constantly on my Rogue, doesn't stop someone else from sleeping/fearing me right after I do that... And when 7 alliance including a 60 Rogue they brought back attacks a horde 31 Rogue and 31 Hunter, it's very gay. My partner and I have been killed many times that way (at least 6 because of camping) and it's not very cool.
When we were collecting daggerspines we beat up two 34 allies (we were 31 each), a Mage and a Priest. Then they had to get their 37 Rogue too, and when that didn't work, they called in a 60 Rogue and a bunch of others and started searching for us. We were just trying to quest. =/ Yay!!!! Yeah, we couldn't kill them all without backup, but we got a few... And WotF didn't help one damn bit, they had more than one person to Fear me so after I used it (it has a crazy long recharge) one of them Feared me right into a Murloc mob while all the allies still shot at me, woo.
And Shamans aren't the greatest, sure they have some strong shocks but they can be beaten by Horde classes (all but one of which you share) and they can't kill your Paladins unless you play wrong, so =P Most of the Shaman I have encountered in group instances are the idiots who ninja loot and run ahead of our Warrior no matter what you tell them, aggro mobs and die exactly the same way multiple times. That's a bonus for you, too, lol.
I'm not trying to be argumentative or shoot anyone down or anything, just wanted to point some stuff out.