AoS EotG and battalion

[N3mesis]

The EotG pitched battle profile indicates that he is Leader, Behemoth and Artillery
What category of a battalion can he fit in (typically in a battle regiment) ?
Clearly it's not behemoth, because it's specified "behemoth without the leader keyword".
So I guess it's probably one of the following options ? :

1. It takes both a commander and an artillery slot
2. It can take either a commander or an artillery slot, up to the player choice
3. There is a rule or FaQ I missed which indicates clearly what kind of slot he should fill

 

[Erta Wanderer]

The EotG pitched battle profile indicates that he is Leader, Behemoth and Artillery
What category of a battalion can he fit in (typically in a battle regiment) ?
Clearly it's not behemoth, because it's specified "behemoth without the leader keyword".
So I guess it's probably one of the following options ? :

1. It takes both a commander and an artillery slot
2. It can take either a commander or an artillery slot, up to the player choice
3. There is a rule or FaQ I missed which indicates clearly what kind of slot he should fill

as far as i can tell he takes up all 3 as far as list building goes but is either a leader or a artillery (players choice) when it comes to battalions.

 

[Killer Angel]

It can take either a commander or an artillery slot, up to the player choice

Yep, that's it. You assign it the role you want and pick a battalion accordingly.