EMMachine

The answer is actually on page one of the Core-Rules. Re-Rolls, last sentence:
So re-rolls have priority over other abilites.

It heals wounds that the unit had suffered before the attack you are saving at the moment.
The point is, that the game works this way.
If an enemy unit for example has 3 weapontypes and attacks one unit you make the following.
Rolling to hit, to wound, save and damage for weapon 1 (putting the damage into a pool) Rolling to hit, to wound, save and damage for weapon 2 (putting the damage into a pool) Rolling to hit, to wound, save and damage for weapon 3 (putting the damage into a pool) Only after you handeled the last weapon, the combined pool of weapons 1-3 will be allocated to the models.
This means if you roll a save of 7 for a wound of weapon 2 or 3. The wounds of weapon 1 or 2 aren't allocated to a model yet, and this way can't be healed.
Only wounds from a combat before this one can be healed because the wounds are allocated to a model.
(this is basicly stated on page 7 of the corerules (allocating models and later)

What gaming mode do you play, because the answer is depending to this?
If you Play Pitched Battle (Generals Handbook 2020, Page 72.) or Meeting Engagements (Generals Handbook 2020, page 88), both have the following rule.
So if you are playing a gaming mode like this. In case of Mortal Wounds you can either use the Chaos Runeshields or Protection of the Dark Gods, most likely prefering the Runeshield because of the better roll requirement, but not both
In case of normal wounds you have your 4+ Save and the Protection of the Dark Gods roll after it.
If you play a game mode that doesn't use the special rule above (Open/Narrative play) you can use both for mortal wounds.

You have to ask for permission because it is a Legends Pitched Battle Profile but other than that it shouldn't be a problem because you only need the Orruks Keyword (which Greenskins have).
Keep in mind that there was a Grand Alliance Destruction Errata, that changed the rules for Waaagh! and Waaagh Banner after Orruk Warclans was released.

"Wounds Allocated to the Model" are all wounds that are currently allocated to the model. A wound get's allocated and than it is allocated to the model until it the model is either slain or the wound get's healed.
We see this for example in the corerules for slain models and healing wounds.
The Artefact triggers when the model would be slain (so when the wounds allocated to him are equals his wound characteristic).
The rule for healing wounds wouldn't work if only wounds that are allocated in during one attack would coun't because most Healing Wounds Abilities aren't used in the steps the model actually takes damage.
 

This is what you are searching for, for the cycle of the Storm (Stormcast Eternals FAQ)
 
There is not really a specific order because most of the time it doesn't really matter after you decide which attacks target which model before rolling any dice for the unit and you  normally add up the wound pool for all attacks the model uses for the target unit and allocate them later, but slayer of Kings would apply before any wounds are allocated to the target because it triggers on woundrolls.
There were some rare cases where the order mattered (Grundstok Thunderers, Orruk Brutes) but their rules were changed.

The Corebook Faq has the answer.

He is an Ally because he doesn't have the "Nurgle" Keyword.
And "being part of a nurgle army", means "having the nurgle allegiance".
So these points are against Belakor getting a spell.
Plus these points of the Corebook FAQ
 

You can charrypick. The rule is written that way, that you can re-roll dice as well that would be successes before modifiers but misses after the modifier.
I think the point of confusion comes from the point that all dice are rolled at the same time.
From the point of view of the corerules each Dice sequence would be rolled one at the time
Corerules Page 7, Making Attacks
So you would roll one Hit-roll, look if you have to reroll it, make one wound roll if it is a success, your Opponent would make his Save roll and than calculate damage if the save failed for the pool.
So each time you check if you re-roll the dice there would only be once dice after each dice is it's own attack sequence. Making multiple attacks at the same time is only to speed the process up.

No,
Generals Handbook 2019, Page 54, Allied units, paragraph 2, first sentence
 

To specify this.
Yes you can use them without spending points for allies or counting against the 1/4 Rule because they are in a Battalion.
They still count as allies for anything else (so they can't fill the minimum for Battleline or can't be general, can't get Artefacts etc.).

After the rules say "wholly within of the  unit"  the entire unit creates a fieldbubble like said in Fieldcontrol:
A unit that covers 12"x1" would have a bubble of 36"x25" where the unit could be fit in. So 1 and 2 are possible.
 
 
 

The rules for the Nurgle Lores on Page 66 states the following:
The Glottkin has the choose if he wants to get a Spell of the "Lore of Malignance" or the "Lore of Foulness", he doesn't get both lores.

You can't get into combat range by normal moves in the movement phase. (except you have a rule that you can pile in if you are more than 3" away like Yethees who can pile in while they are in 6" of enemy units), because you have to end normal movement outside 3" of enemy models while to pile in you need to be in 3" to the enemy unit.
Corerules Page 4, Enemy units and Retreat
Corerules Page 5, Piling In
So if you want to attack a unit in close combat you have to charge them or get into pile in range when another unit in combat piles in into the 3" Range of your unit.
 
And if you are in 3" you can't make chargemoves.
Corerules page 5, Charge Phase, Paragraph 1, last sentence
 

I contacted Adam about the ruledifference between App and Battletome, so I think it will be corrected soon.

We had this question basicly 3 days ago here:
In this case the corerules state this (Corerules Page 11, Objectives, last paragraph)
So a unit can capture 2 objectives, but models in range of 2 objectives can only be count towards one of them.

That's basicly an paragraph above (Corerules Page 11, Objectives, paragraph 4) :