Raid Mob Poison Immunity

[7thGate]

I was doing some experiments with Rogue poisons for possible raiding applications, and there were a few potentially useful things in there. But I have realized, I don't actually know if there are any raid mobs in the game that are not immune to poison. Its kind of hard to check since most raid mobs aren't exactly sitting up (Sontalak appears to be immune though, I had enough time when we was being left up to get 23/23 resists with Malo).

Has anyone definitely landed a poison effect (Scent of Terris, Bane of Nife, etc) on anything of consequence before?