Rules Clarification : Channeler  and/or Arc Node     (Edit)
General

• It is possible to channel a spell with a range of CTRL. The control range is still measured from the caster though, so channeling it has zero effect ... unless you've got something like Empowered Arc Node or Reaction Drive. Stuff like that can trigger. (Infernal Ruling)

Channeling in melee

• A channeler that is engaged by an enemy model can not channel.
• A channeler that is engaging an enemy model can channel. (For example, the channeler is standing in the enemy's back arc.)

Channeler - LOS

• You use the channeler's abilities when determining LOS (such as whether you can see your target through a forest).
  • If the channeler has an ability to ignore LOS or DEF bonuses (such as Eyeless Sight), then you only apply that "ignorance" to LOS (but not to the DEF bonus).

Caster - Attack roll

• You use the caster's abilities when determining attack roll modifiers (such as whether a target standing in a forest gets +2 DEF or not).
  • If the caster has an ability to ignore LOS or DEF bonuses (such as Eyeless Sight), then you only apply that "ignorance" to the dice roll (but not to the LOS).

Stealth - It affects both LOS and the attack roll

• Since Stealth has both a LOS modifier (stealth models more than 5" away aren't intervening models) and an attack roll modifier (stealth models more than 5" away are auto-missed) things get a little complicated.
• If only the channeler ignores stealth, then all stealth models count as intervening models and block LOS, but the caster will auto-miss models more than 5" from the channeler.
• If only the caster ignores stealth, then only models within 5" of the channeler block LOS, but the caster won't auto-miss no matter what you target.
• If both channeler and caster ignore Stealth, it works as you'd expect.
• Stealth Examples     [Show/Hide]

  • Caster has Eyeless Sight, channeler does not.
    1. Stealth model is within 5" of channeler
       • LOS - The model counts as an intervening model, as per the normal Stealth rules
       • Attack roll - If you attack it then you don't auto-miss, as per the normal Stealth rules
    2. Stealth model is more than 5" away from channeler
       • LOS - The model does not count as an intervening model, as per the normal Stealth rules.
       • Attack roll - If you attack it then you don't auto-miss, as the attacking model has Eyeless Sight.
    3. Stealth model is more than 5" away from channeler, and you want to target a model behind it.
       • LOS - The front model doesn't block LOS
       • Attack roll - Doesn't auto-miss

   

  • Caster hasn't got Eyeless Sight, channeler does.
    1. Stealth model is within 5" of channeler
       • LOS - The model counts as an intervening model, as per the normal Stealth rules
       • Attack roll - If you attack it then you don't auto-miss, as per the normal Stealth rules
    2. Stealth model is more than 5" away from channeler
       • LOS - The model counts as an intervening model, because the model drawing LOS ignores Stealth.
       • Attack roll - If you attack it then you will auto-miss, as the attacker doesn't ignore Stealth.
    3. Stealth model is more than 5" away from channeler, and you want to target a model behind it.
       • LOS - The front model blocks LOS, so you can't target the rear model.
       • Attack roll - N/A