20cm move for the Plague Tower but no marching for Nurgle Daemon Engines would be a good idea. I'd be inclined to make the individual Plague Tower 325 though, with additional upgrade ones (to go with infantry or this first individual Plague Tower +300).
Consider adopting the +1 to activate when engaging for Khorne Daemon Engines that they have in the Epic-UK World Eaters list. It seems very fitting for them to be better at doing what they love and kinda silly for a Lord of Battle to get confused and not charge enemies right next to him one sixth of the time. An option to add 1-2 extra would be good. Maybe they're slightly overpriced too? The Epic-UK WE list has 4 for 275 and that's with their higher strategy rating and better chance of engaging.
Now that there's a v0.2 of the list remove 0.1 from the first post, don't have both there. That's what others normally do and it stops people accidentally using the out of date list thinking it's current.
Chaos Alter in the upgrade list is misspelt.
The Defiler is missing the Infiltrate and Walker special rules which is should have. It's battle claws should be MW too.
Is the reduction to FF5+ deliberate or a typo for the Lord of Battles? It had FF4+ in the original LATD list and in the Epic-UK lists and has enough guns that do have 4+ seems appropriate. I would recommend adopting the worse critical effect of it also taking an extra point of damage as well as the random move - this has been applied across the board to other too easy criticals like this (Warhounds, the Slaanesh titans, etc) and in the Epic-UK WE's Lord of Battle.
Is Chaos Hounds having Fearless and an Invulnerable save intentional or a mistake? I believe they are intended to be mortal dogs and they didn't used to have either of these special rules. They'd be a bit good for their cost with them.
Is Contagion Engines having speed 25cm rather than 15cm a typo? They're meant to be slow and to be to garrison. They used to 15cm in the original LATD list and are that in the Epic-UK lists.
Your Greater Daemon criticals are wrong -
summoned units within 5cm should be destroyed on a 6+. It shouldn't effect all units. See the BL list.
Plague Bearers typo - 'Plague Sawords'.
Daemonic Beasts should have no FF value whatsoever not 4+.
I see you've adopted the BL summoning changes which is great
The way it's formatted at the moment makes it unnecessarily unclear though - at present there's a table that just has Daemonic Beasts next to undivided. I had a quick look and assumed that was it for a while. Only later did I see the extra line a couple of lines below mentioning further summoning options. Do it the way Epic-UK have it instead with "Daemonic Beasts, Any other Lesser Daemon for twice the usual summoning points, Any Greater Daemon" all in one line next to undivided in the table. Much clearer.
I've got two formations of bases of 'Slaanesh Spawn' (slimey, vaguely sperm-like looking things) that I use as proxies for Plague Zombies so I would be sad to see them made Nurgle only and hope they stay neutral. I'd prefer to keep the name of Plague Zombies for the unit though, rather than renaming it something more generic, people can just use counts as.
Maybe the Doomwing could go up to 30cm range for it's weapon like in the Epic-UK TS list? They've altered Fire Lords cost and made them cheaper too. I'm strongly opposed to their change of making their bombs BP2 rather than D3 BP though - Tzeentch is the god of change and randomness and random elements like this in the list are highly appropriate.
I keep bringing it up occasionally but please, please consider giving the Chaos Altar the option of a split profile choice just like a Daemon Prince can have - with slow and tough armour or fast but weaker armour. Chaos Altars are extremely thematic (I have beautiful extensively converted altars for each god that really show off what the god stands for and the mutated weirdness of chaos, much more than infantry can at this scale) and I always take one per chaos god I'm fielding in the game for modelling and theme reasons, not wanting to use Hydras at all. Unfortunately they're so slow and can't garrison so you're left with many expensive slow formations and limited tactical choices, particularly when using 4 altars in a 3k game as I often would. The end result is in practice I simply choose to play other armies instead while my LATD kick their heels unused on the shelf. If they had an
alternate option of dropping to a 5+ Reinforced version in exchange for a 25cm move that would be fantastic as they could also be used with mechanised formations. They'd slow them down a bit, so be a trade off - like adding a Land Raider to a Tactical formation. I can definitely imagine some chaos factions - Slaanesh and Tzeentch in particular - building faster, lighter altars compared to the others and there's no inherent reason why a large altar needs to be slow, there are plenty of ways they could be made fast using technology and/or chaos weirdness. As it would be an alternate optional choice it would add the option for those that chose to use it, while not effecting existing peoples lists if they don't want to. I'd definitely playtest this and the list a lot (6+ battle reports) if you were to trial it.
