SanKeshun |
If you have money, get sixteen dancing weapons and Quick Draw. Each round you can release a new pair of weapons to dance. Since catching them is a free action, you can maintain this more or less interminably. The four round recharge time is why your bought sixteen instead of eight, by the way.
Better yet, this doesn't require you to make the attacks at all.
This costs about 512,000gp making it not that viable until you hit around 18th level (based on this).