Some Nighthaunt units are part of LoN and don’t need to be allied, those are the ones mentioned in the FAQ. The rest of the Nighthaunt can be allied in. Picture is from Pitched Battle Profiles 2019.
This is the exact wording of the ability:
" If the damage inflicted by an attack, spell or ability that targets or affects this model is greater than 1, change it to 1. "
What's the basis for that FAQ answer? It makes no sense, Mourngul clearly has the Nighthaunt keyword and the Legions can all ally in Nighthaunt.
Looks to me they forgot to edit that FAQ at some point. GW and their rules writing...
From the Core Rules, page 1: "Sometimes there will not be enough room to set up all of the models from a unit. When this is the case, any models that cannot be set up are considered to have been slain."
So you set up as many as you can fit.
Can normal command points be used for the OBR command abilities? Don't know if anyone can ally them in yet, but for the sake of argument, in a GA: Death army.
He got some other boosts, so it evens out I think. Always healing 3 wounds to four summonable unit wholly within 24” is better than before. That’s potentially 4 Spirir Hosts back each turn.
There went that old lizard skin rumour engine. Not from any new Seraphon. https://www.warhammer-community.com/2019/09/18/fists-and-fire-new-miniatures-revealed/