Them dunyains... suspicious folks -.0
Interesting that the dreams were sent to many recipients simultaneously.
Also the snake-y voice? Perhaps the cish use the sssssnakes for an utteral component 
Makes me wonder about Moe's comment about facility with scrying. Could he have been observing Kellhus' progress? From campfires and hearths maybe?
The comment about scrying stands out to me for a couple of reasons.
If I'm not mistaken, Kellhus is able to use the metagnostic cant of transposing to get to either places he can see, or places that he knows very well. Furthermore, the cants of calling require that one be familiar with the place the recipient is in, which seems to tie into the whole needing to see the physical place or be familiar with the location before being able to transpose the two grounds. The restrictions about knowing the place could have several implications: needing to hold the spatial and temporal locations of the ground in your awareness to direct an inutteral toward it; and perhaps needing to be familiar with the meatphysical location of the ground, needing to know how the place that is your soul in the outside connects with the place that is that ground in the outside.
There are a couple of things I'm speculating about here: how and whether souls can interact with the metaphysics of the ground, whether there's a difference between soul and ground at all (perhaps not, considering how Kellhus says soul becomes place when we see the cant of transposing), and whether there's a connection between knowing the ground you want to go to and the probability trance.
I think that for Kellhus to know that nothing will interfere with the ground he wants to go to (like a bashrag smashing the ground or Aurang collapsing the floor beneath him), he has to know how that ground will appear in the future, which he may be able to accurately determine with the probability trance. It might also be that the probability trance draws a metaphysical connection between Kellhus' soul and the ground he wants to get to, but I've got no concrete evidence for that.
A lot (perhaps all) of Moenghus' magic that we've seen or that he claims to be capable of might be connected to knowing the ground and its movements, something best done through the probability trance (or the Thousandfold Thought, but I'm still not sure what to make of that). If Moenghus is capable of scrying, how might those skills be enhanced by the probability trance, and how may those enhancements enable him to manipulate Kellhus' journey and domination of the holy war?
The scrying could also be strongly linked to the third sight of the Cishaurim. Even if Moenghus could carry no water, if he made improvements to srcying with the probability trance and he could teach the Cishaurim to better grasp the subtleties of emotion involved in those improvements, then perhaps the Cishaurim weren't able to see Kellhus just because he shone in the third sight, but because his location, his soul, connected to so much ground that they couldn't help but see him. All roads lead to Kellhus.
Another errant thought is that the snakes may facilitate the third sight. We know from Mimara that they're holy, and Moenghus calls them his eyes, so there may be in intimate connection between a Cishaurim and his snakes. If so, then maybe the snakes make whatever sight the Cishaurim have more ... holy? I may have to continue this in Storks, Faith, & Holy Animals.