No towers?
I like some of these ideas, though. This is something I pushed for in the TS list, wacky weirdness and misdirection. I like how you want it to be a significantly different list from AMTL, but there are few undertones that may or may not have been intentional.
-The required support formations appear to be almost as much of a liability as a boon in some cases.
-This may play as a LatD with titans instead of daemon engines.
-If you take away many too cool options from the AMTL (like Knights, for example), the titans themselves will probably have to be noticeably better/more expensive to compensate. This may introduce power creep as well as fluff-based objections ("why are tzeentch titans THAT much better?").
Bear in mind, these are not meant as criticisms, they are just observations. If this is all intentional and ends up working, I'll be very happy.
I don't see why a Tzeentch class of Imperator would be any more unwelcome than a standard one. Keep at it, if people don't want them, they don't have to use them. Maybe keep the leg bastions as they are, and add two roosts as replacements for tower bastions or something. Make this guy a super siege tower, maybe?
Suggestions/Names:
-Maybe change the name of "Blind Seers", to "Failed Aspirants"
-Path of Sorrow
-Twisting Path
-Touch of the Void
-Glimpse of the Void
-Gate of Dreams