love the unit so far.
This is just a suggestion, but your demonic herald on the blood letter unit made me think about it. What if you did the one with no eyes, or even the demon prince like the child eater from pan's labyrinth?
Vid and pics for reference
[url]http://www.youtube.com/watch?v=n9YD2PFF31E[/url]
Obviously I wouldn't thing the whole holding up your hands on your head is very scary, but the eyes in the palms is kinda creepy.