Today I will play a list very similar to yours, same tactics, I'll let you know how it went! I'm not sure I'll include that many sigils though (since sometimes I want my squads to flee and die, and stubborn can be a disadvantage).
Since I play ITC, I can't have 4 detachments (3 max), so you're lucky!
With this army, you should consider fortifications: VSG, shyshield landing pad, pipelines and aegis defense line all give good and extended protection whose potential we can fully exploit.
Depending of what special rule you want, you might consider taking your Griffons in an
IA13 CAD. Their weapon have the Pinning rule in that codex (not in Siege of Vraks). It would also give you access to the tzeentch covenant (bs2 snap fire) which can be good in some particular builds. (It's not perfectly clear though if you could take the zombies in that
CAD).
Personally, I would buy a third extra crew for the rapiers (which need to be in front because of their "short" range) instead of the one for the earthshaker (which can be
far away in your backfield).
while not making an entirely unplayable army due to too many models
It's
very borderline. I have a little less models than you and I find it almost impossible to play 4 turns in 2h30. But I'm slow and will try to play faster.
with spawn following close behind using the cover saves
Not sure if you are referring to the normal 5+ cover save or to the 3+ from Infantry squads, but only units from the Unending host can get the latter. So I try to take in the Unending host the unit that will serve as a bunker for my warlord for it to get the 3+ (me it's a unit of 2 medusae, so I don't lose the bonus from the Purge).
Hydra with training 70pts
Hydra with training 70pts
I know I make this point often, but I'm not sure they are worth it (though I never used them). Like Wyverns, there are very fragile compared to artillery units. I think you have enough models on the board to cover half of it and deny mobility to flyers and
FMC.
Probably my biggest worries are invisible/unkillable psychic deathstars
There's not much we can do (or anyone else) unless allying with Tzeentch heralds and Cabal sorcerers. Or a Culexus (I can't with ITC but otherwise I might consider it).
Automatically Appended Next Post: Here's my list for tonight. I ordered spawns and earthshakers but don,t have them yet, so that's why they are not in the list. When I'll have them, I'll make room by changing melta for flamers and VSG for pipelines and remove 40 zombies.
1822
Unending host detachment from Siege of Vraks 770
Command squad with Nurgle Master of the Horde, Banner 110
15 men with lasguns, 3 meltas, training 85
15 men with lasguns, 3 meltas, training 85
15 men with lasguns, 3 meltas, training 85
15 men with lasguns, 3 meltas, training 85
15 men with lasguns, command net vox 50
15 men with lasguns, command net vox 50
10 zombies 30
10 zombies 30
2 medusae 160
Combined arm detachment from Siege of Vraks 610
Command squad 45
10 zombies 30
10 zombies 30
3 wyverns with heavy flamers 165
2 medusae 160
3 quad launchers 90
3 quad launchers 90
Combined arm detachment from Siege of Vraks 342
Command squad 45
10 zombies 30
10 zombies 30
3 Rapier laser destroyers with training, one extra crew 79
3 Rapier laser destroyers with training, one extra crew 79
3 Rapier laser destroyers with training, one extra crew 79
Fortification 100
Void shield generator 100