mist only useful when you are waiting for bat swarm to cool down
wrong. entering mist removes all negative buffs.
But you lose about 700 mana until you can get out of the mist, so its just waste.
I mean, Instead of getting mist and mass charm, i would go for 1 conversion and full coven
you know the vampires are the best harrasing minions
And in order to get mist, you need lot of supportive helmets which makes you hard.
If you use just bite and bat swarm build with minions, you can stack at health and dodge as well and only get 1750 helm