I'm not sure if they're vulnerable to any CC method.

My hunters would always use a Freezing Trap so 75% of the taming event has the mob standing stationary.
I have tamed a rare on several occasions, by having my mage Sheep it. Once the taming ends, the sheep breaks and you have yourself a pet.

I'm not sure if they are vulnerable to CC's, but if they are, this would be a huge help.