How to "Farm" Firebird?

[Delta Prime]

I know you can only get one feather per day and it seems Firebird is rather quick to return back to it's containment unit even after being attacked. Are there any specific weapons of loadouts I should be using to get the feathers from it?

[Screen Lady]

I personally stacked all my level five agents with some serious red resistance, then mobbed it all at once, but this was a bit late-game.
If they have good enough health and resist, they should be fine dealing with the charge attack, and give them good enough weapons and they'll kill the bird generally before the continued damage kills them. Just remember to stack black and pale on your agents.
Personally though, I'd recommend you don't farm the feather yet unless you've unlocked all of Binah's perks so that you won't have to worry about losing it on death to refarm it.

[Nocturnal Pie]

I gave all my fighters red resistance armour and then gave them every black damage weapon I had. Any damage is helpful but black is the best I believe (Pale might actually do more damage). That and fight it in a place you can quickly exit out of. The less time it spends charging/ the less time you spend out the room, the more time you have to kill it.