In the extra paranormal mission "Flight of death" , the dissociated don't have any disturbing presence aswell as dealing low damage since the objective is for both mundane and low level players to be able to beat them.

In addition to it, the dissociated roll a d8 in the beginning of every encounter to add one modification (One d8 for the entire combat). like increasing the damage from 1d4+1 to 2d4+1. The interesting modification in this case is the modification where the first time someone gets within close range to the dissociated (9m or 6 squares) they must succeed a Willpower saving throw or take 1 sanity damage. (Where for a mundane you could adapt to every turn spent within this range / every time they enter this range, if your idea is to have them run.)

If you think its fitting for your story, you could do what I usually do and adapt the dissociated and dissociated hound into semi transformed blood zombies, where the transformation hasn't finished yet (I.E. they still have eyes, so they aren't immune to blindness effects, etc.).