So far my best anti-tantrum spiral weapon has been a royal dining/meeting room with artifact furniture near the entrances. Angry dwarves go in one end, happy dwarves come out the other end.
Also I found a use force my combined for of ~50 or so war dogs and giant war leopards. I just let them sit around inside the meeting hall when I'm being attacked, and anything that comes in while my military is busy is instantly mauled to death by dozens of angry war animals all in a 3x3 space forming a bloody quantum jerk circle around the victim. It's incredibly effective, most intruders who somehow get past my legendary army die within seconds of stepping into the meeting hall.
Also holy stuff. I have a Swordmaster who seems to be absolutely invincible. "She is unbelievably strong, basically unbreakable, very rarely sick and quick to heal."
This forgeter cleaned up an entire goblin siege composed of roughly 30 goblins and 20 ogres single handed, then walked back in to the fort with nothing but a mean appetite. I haven't seen her get hit in any combat reports, let alone get injured.