To defeat the Boss with Judge, use WordOfPower. When Judge's conviction disappears, go up close with the sword and slash. The Boss will kill you, but you will return with more conviction. Then, use WordOfPower and repeat. To defeat the Boss with Judge and Defender, use the same as with just Judge, but have Defender get all the special weapons on the level. While Judge does his attacks, have Defender stay back and shoot.

When fighting the Mansion Boss, keep yourself directly behind him and kill him using any weapon. He cannot hurt you from that position unless he turns around and faces you. The key is to face his back.

The easiest and fastest to kill the Mansion Boss is with a chainsaw. Get behind him as much as possible and use the chainsaw completely to kill him quickly.