I expected some sort of mental attacks for the telepathic archtype, and they do have the mental scream trick. My only concern is that though the attack is a purely mental attack, the character still makes a Stun check as normal after the Communicator has won a contested spirit roll. This would seeem to me to give an advantage to the physically strong, rather than the mentally strong. To me it seems that even with a large number of extra successes over a strong character in the opposed roll, the stun still probably won't happen. Especially when you consider the lower likelihood of multiple extra successes since the Communicator does not have a plus to her Spirit.
Wouldn't a quicker and more accurate mechanic be to let the contested roll determine how many rounds the target is stunned? The target character could attempt to break the stun as normal starting with the second round. This gives people with a strong Spirit more likelihood to resist and gives the strong guys a good chance to break, but makes it so their enduring physical strength doesn't also completely shield them from mental attacks.
Just a thought, shoot me down as you like.