Try complete feat "Jury Tampering". After 12 humans inside we try to kill 1st boss, and he didn't die without HP https://drive.google.com/open?id=1tS1pXwhqFo2srAQpKL06ChJbhLJwsFMQ
You... stacked the jury with 12 Brainiac Jurors, the exact opposite of the feat. The unkillable part might be an issue, but you are supposed to transport the humans and kill the Brainiac transporters.
If I recall, once he gets 7 braniac jurors he used to become unkillable and would normally wipe out the group. He's just to weak to do it now. The other 5 brainiac jurors were just gravy on top. But yeah, OP did the opposite of the feat. OP, just a tip too. Once you get 7 human jurors the bailiff will become killable. As you are way over powered that means your pets will likely take him out before you can get 5 more humans in...so put those away. If the bailiff dies, the rest of the jury auto fills with braniacs.
