Looked up the post. Alivaril said she'd veto it while trying to help others. Conversely, trying to kill someone seems like exactly the time to try and channel it.
While this would ordinarily be a pretty good time to try it, you don't have enough Black right now to get much mileage out of channeling Black (barring draining large amounts of jungle for power). At least, not without using a fire-aligned Wrath of God, converting it to Red, concerting that to Black,
then channeling Black. But, well, that visual display would be rather conspicuous.
Well, this isn't good. I am very skeptical of the Hunter being able to shoot down a missile, though - he is using a handheld weapon. He is aiming with his hands and his brain. Missiles are fast. Sure, lasers are faster, but his reaction times are not zero. He should not be able to shoot down fast projectiles. If he was fast enough, he'd be completely untouchable.
Agneyastra's primary concern is that if the Parasites are destroyed, they're built with redundant self-destruct mechanisms. If a missile is disabled, the TSAB didnt include any such safeguards. So you
can choose to strafe the Hunter, Agneyastra is just opposed to it out to simple caution.
Honestly, just withdrawing would be the best option here. If still a bad one - we already revealed the drones. This means ethereals will be escalating. And x-com is unprepared for that.
Actually, the Parasite Droids are perfectly in line with what a few independent engineers have been using to defend secluded settlements. XCOM and EXALT even have
flying drones with budding artificial intelligences.
You also don't really think the Ethereals are going to escalate until and unless XCOM actually does something harmful with any of new technologies. Ethereals seem to have some pretty major blind spots as far as risks are concerned, possibly born from the baffling "If your soul is strong, you're a person, and since we gave you personhood, you'll understand the actions we undertook." Or something like that, anyway.