Pyramidion/Goldfish was the last great mirror match era I can remember, which actually was still a thing when the Mobula reigned supreme. I tihnk a few double Mobula matches came after that, but teams often switched to Mobula/Goldfish, especially after the Squid came back into competitive. Whereas Pyramidion and Goldfish was an unstoppable brawling train, the new team comps of Squids or Galleons as Mobula allies seemed much more counterable.
I don't actually remember the competitive scene very well between the Rob and Dan Invitational and the Blood and Brass. But it was definitely a time where teams flew what their pilots liked to fly.