Why no conventional brig duel decided the Napoleonic Wars

What was the most important brig action of the Napoleonic Wars?

No conventional brig duel stands out strategically, although Pulo Aura technically qualifies because disguised East India Company merchantmen deterred a stronger French force.

Brig actions are judged useful and necessary without a conventional brig duel standing out as strategically decisive. Brigs could support convoys and their escorts, but an important convoy would normally have a larger warship to protect it. That could be a frigate, fourth rate, or third-rate ship of the line. A later correction accepts Pulo Aura as technically a brig action, while stressing that East India Company merchantmen faced a French force including a ship of the line. Their disguise fooled the French into believing they faced ships of the line.