Goblin King Kong
HP/AP: ~192000
Reward: 2100000 XP + 19200 BP
Drops: see table above
Edit: Did it some time ago and it was around 132000 HP/AP duo. Either they changed the HP/AP again or it is still a bug in damage counter. Damage depends on how many player are inside the room. Did it solo and damage now was 192091, video will follow.
Edit 2: Exclusive now on FGunZ until music will be added. Final version will be on my Youtube channel.