Cr1m50n

Not to belabor the point but this is something I'm actually hoping you or someone else here could provide some insight on. The chain of events around rulings on this has me confused. Firstly in the general handbook 2019 itself it has a section of rules (pg. 58 I think??) that effectively rules out models without points in this book or newer publications. However it does as you say provide a stipulation that you can ask an opponent permission to have the model allowed. Easy enough. However once the errata released in the designer commentary. There is a question asking exactly the same question. "Can models without points in the ghb or ghb errata (note the absence of later publications as well) be used in matched play. To which the faq responds with a singular and confusing word. "No." Could anyone shed some light on this. Does the designer commentary overrule the ghb itself? As the simple "No" appears to remove our ability to ask permission to use the model. Thanks guys.

No. Models that fly can simple act as those terrain isn't there when moving. They are stilled blocked by Los blocking terrain if they are behind it. UNLESS you are referring to the citadel wood rules which have bespoke Los rules that require you to draw a 1mm line from the nearest points on two models and if it crosses the woods then line of sight is blocked. If I am remembering correctly those rules specifically have a stipulation saying if models can fly you ignore these rules.

You Guardian of Souls w/ Mortality Glass is not legal in any army as it never got its points included in the new GHB or GHB errata. Sad as that is..

Nighthaunt battallions are granted to a Nighthaunt Army. It has nothing to do with keywords and everything to do with the allegiance choice you make when creating the army as per page 52. Of the nighthaunt battletome. Nighthaunt battallions are only available to a Nighthaunt Army, which is to say an army that has chosen the Nighthaunt allegiance, not the Legion of Grief allegiance.

I mean you can turn off most of the blightking damage with a -1 to hit. Which olynder/mourngul have easy access too, and harridans if u have a Leadership nukes. But yeah my primary opponent is nurgle, and yeah it's a very tough match up.