1.9.8 Barrages
Can a Barrage template be placed over units that can't be seen? Or over units that are out of range?
Yes, each weapon contributing to the barrage need only have a line of fire and range to a single unit under the first Barrage template. Extra Barrage templates do not require either condition, and an indirect fire barrage does not require a line of fire.

Can a Barrage template be placed completely out of range?
Extra templates certainly can, and the first Barrage template can in certain circumstances (a unit that is partially in and partially out of range for instance). The Barrage template can be placed over any part of a unit (even if that part is out of range) so long as part of that unit is in range. A line of fire is still required to this unit, unless it is an indirect fire barrage.

(Also, drop the "Is it possible to place extra..." Q&A)

1.10 Overwatch
Do formations on overwatch need to take an Action test to remain on overwatch?
Yes. However, if all the unactivated formations you have left are on overwatch you can declare they are all remaining on overwatch without an Action test (even if they are not a legal formation, in enemy zone of control, have Blast markers, etc.), effectively ending your part in the Action phase.

An air assault suffers overwatch fire when a transported formation disembarks. Which formation receives the Blast marker for coming under fire?
The disembarking formation, as it triggered the overwatch.

A commander orders a second formation to follow their formation in an assault, they count as a single formation when making an engage move and take overwatch fire. Which formation receives the Blast marker for coming under fire?
The formation that was closest to the enemy overwatching formation.

2.1.13 Skimmers
Two skimmers in an assault are in base contact with enemy units. One uses its close combat and the other its firefight. The enemy inflicts one hit on them, can the skimmer in firefight be allocated the hit?
Rules as written, yes. However, players doing so should be publicly shamed and ridiculed.

3.1 War Engine Movement
What happens to a war engine that fails a dangerous terrain test?
It takes a point of damage (check for a critical hit), but does not take a blast marker.

3.2.4 Blast Markers
Does a war engine's formation recieve a Blast marker if its critical hit effect causes a point of damage?
Yes.

3.3.1 Charge Moves
How many units does a war engine making a charge move count as when moving into base contact with an enemy unit?
One. A war engine may have a number of units equal to twice its starting damage capacity in base contact with it but it still only counts as one unit when it moves into base contact with another unit (i.e., a Baneblade with a DC of 3 could be contacted by up to six enemy Shadowswords).

Can a war engine counter charge if it has enemy units in base contact?
Yes, so long as the number of units in base contact is less than its starting damage capacity.
(Rules as written it's technically no but I don't think I've ever seen it played that way)

4.2.3 Anti-aircraft Attacks
Are jink saving throws invulnerable?
No.

4.3.4 Pin-Point Attacks
If a formation contains multiple war engines who picks the target of a pin-point attack?
The attacker. Tell your Commissars to stop opening hatches and waving swords around, they can be seen from space.

4.4 Planetfall
What happens when the "nearest area of clear ground" isn't big enough to deploy an entire formation entering play via planetfall?
The opposing player moves it to the nearest area of clear ground where the entire formation can deploy.

An air assault suffers overwatch fire when a transported formation disembarks. Which formation receives the Blast marker for coming under fire?
The disembarking formation, as it triggered the overwatch.

Can a war engine counter charge if it has enemy units in base contact?
Yes, so long as the number of units in base contact is less than its starting damage capacity.
(Rules as written it's technically no but I don't think I've ever seen it played that way)

Defending units that are not already in base contact with an enemy unit are allowed to counter charge

4.3.4 Pin-Point Attacks
If a formation contains multiple war engines who picks the target of a pin-point attack?
The attacker. Tell your Commissars to stop opening hatches and waving swords around, they can be seen from space.

4.4 Planetfall
What happens when the "nearest area of clear ground" isn't big enough to deploy an entire formation entering play via planetfall?
The opposing player moves it to the nearest area of clear ground where the entire formation can deploy.

even if for example, the OW fire was AT and could only hit the transport war engine?

RAW in my opinion it's not really technically no, the first line of the relevant paragraph is pretty explicit (emphasis mine)

If I'm reading your response right your logic was mine. Rules say no counter-charge if a unit is in base-to-base, but WE FAQ allows it to barge on the counter-charge. That's how I ended up with the "counter-charge so long you have less than your starting DC in base contact". It mirrors how it works with no-WEs that way, and also avoids the following weird situation:

Base to base with a single enemy WE and it can't counter-charge. If you fail to do that though, it's allowed to barge up to twice it's starting DC.

It's going to be better to avoid a series of if/then statements, so if this doesn't work for people I'd say go with the "whichever formation was closer" ruling from below. I went with this as it was the answer I remember Neal providing.

1.9.8 Barrages
Can a Barrage template be placed over units that can't be seen? Or over units that are out of range?
Yes, each weapon contributing to the barrage need only have a line of fire and range to a single unit under the first Barrage template. Extra Barrage templates do not require either condition, and an indirect fire barrage does not require a line of fire.

Can a Barrage template be placed completely out of range?
Extra templates certainly can, and the first Barrage template can in certain circumstances (a unit that is partially in and partially out of range for instance). The Barrage template can be placed over any part of a unit (even if that part is out of range) so long as part of that unit is in range. A line of fire is still required to this unit, unless it is an indirect fire barrage.

(Also, drop the "Is it possible to place extra..." Q&A)

1.10 Overwatch
Do formations on overwatch need to take an Action test to remain on overwatch?
Yes. However, if all the unactivated formations you have left are on overwatch you can declare they are all remaining on overwatch without an Action test (even if they are not a legal formation, in enemy zone of control, have Blast markers, etc.), effectively ending your part in the Action phase.

An air assault suffers overwatch fire when a transported formation disembarks. Which formation receives the Blast marker for coming under fire?
The disembarking formation, as it triggered the overwatch.

A commander orders a second formation to follow their formation in an assault, they count as a single formation when making an engage move and take overwatch fire. Which formation receives the Blast marker for coming under fire?
The formation that was closest to the enemy overwatching formation.

2.1.13 Skimmers
Two skimmers in an assault are in base contact with enemy units. One uses its close combat and the other its firefight. The enemy inflicts one hit on them, can the skimmer in firefight be allocated the hit?
Rules as written, yes. However, players doing so should be publicly shamed and ridiculed.

3.1 War Engine Movement
What happens to a war engine that fails a dangerous terrain test?
It takes a point of damage (check for a critical hit), but does not take a blast marker.

3.2.4 Blast Markers
Does a war engine's formation recieve a Blast marker if its critical hit effect causes a point of damage?
Yes.

3.3.1 Charge Moves
How many units does a war engine making a charge move count as when moving into base contact with an enemy unit?
One. A war engine may have a number of units equal to twice its starting damage capacity in base contact with it but it still only counts as one unit when it moves into base contact with another unit (i.e., a Baneblade with a DC of 3 could be contacted by up to six enemy Shadowswords).

Can a war engine counter charge if it has enemy units in base contact?
Nothing in 3.3 specifically overrides "Defending units that are not already in base contact with an enemy unit are allowed to counter charge," from 1.12.4. However, War Engines are allowed to barge as part of their counter charge, so it should be brought up in the five minute warm up. A suggested compromise is to mirror how a war engine loses its zone of control: so long as the number of units in base contact with a war engine is less than its starting damage capacity it may counter charge.

4.2.3 Anti-aircraft Attacks
Are jink saving throws invulnerable?
No.

4.3.4 Pin-Point Attacks
If a formation contains multiple war engines who picks the target of a pin-point attack?
The attacker. Tell your Commissars to stop opening hatches and waving swords around, they can be seen from space.

4.4 Planetfall
What happens when the "nearest area of clear ground" isn't big enough to deploy an entire formation entering play via planetfall?
The opposing player moves it to the nearest area of clear ground where the entire formation can deploy.

I discussed the countercharging stuff with dptdexys, MikeT, and Steve54 last week, I'm pretty sure that the EpicUK approach going forward will be that war engines are not permitted to countercharge if enemy units are in BTB contact. The intention is to follow the rules as written, even if it can lead to weird situations

Would you discuss the epic UK ruling on 'passing' on overwatch formations at the end of the turn? The written rules contradict that one too, i.e. all formations take an action.

Would you discuss the epic UK ruling on 'passing' on overwatch formations at the end of the turn? The written rules contradict that one too, i.e. all formations take an action.

Section 1.10: Overwatch

Q: Can a unit remain on Overwatch into a following turn?
A: If the Formation hasn't fired by the end of the turn, then they can remain on Overwatch into the following turn.