Blood Elf for horde.
Because the racial silence is off of the GCD.
Which essentially lets you lock out any casters (AoE) in the kill zone.
With a relatively short refresh.

Go the same set up as Mind Freeze.
Create a mapped key with a step for each Blood Elf on the team.
Set them to not advance for 3-4 seconds.
Give it an extra step, at the end and set that to not advance for 5 mins or so.
But set the entire mapped key to reset to step 1, 'x' seconds after the first press (which allows the silence to refresh).
Then imbed that as a Do Mapped Key action, in your main dps sequence.

I went with an extra step early.
That doesn't do anything, but won't advance for 4 seconds.
So when I'm killing crap mobs.
The ones that die in 2-3 seconds or even instantly from one attack.
Well, they don't have me waste the silence.
But any combat that lasts more then three moves...
And the silence starts.



If you like Goblins, go with them.
They'll be a fun race.
But I would bet Blood Elves are mechanically better.