Tom Clancy’s Rainbow Six Extraction

Easily performed for the opera Tachankin. Place a turret, attract the Leader with an “Aura” grenade, shoot him in the face from the turret - repeat 10 times

HIBANA lvl 10
We saw the leader, threw a stun (shock), shot at him 2 times with an ult and immediately explode!
He dies immediately on any difficulty, it will also help when passing the test for the Leader so that he does not cause cocoons and does not cause damage to anyone.

Be sure to mark the Leader immediately with the cross up so as not to lose sight of him!

They are killed even by characters who are not leveled up, they even get killed on 2-3 difficulties, you don’t have to choose the last one! On the latter, they appear more often, but it is also more difficult to kill them.
It doesn't really depend on the location either.
As long as you complete the challenges and level up your characters, it will be easy! (Killed at least 50 alone) Don't try to kill him if he summons Splinters from his cocoon, especially after the Raging Splinters update. It’s easiest when the Leader summons bubbles, since after the explosion they easily kill him themselves.
It's even easier to kill as characters with a shotgun and machine guns
Killing is not difficult even with characters who are not leveled up and even with those who are level 1
I advise you to stun them