one of the important trick is timing. Most high power players often finish matsuri at the start of the event ASAP because they know it easy for them. Therefore, the chance u gonna match up with big opponent are greater if u decide to do it early. i always do matsuri after 9 tails, less trouble easy to win. And if u are on a winning streak, dont hesitate to swap out ur best team and replace them with ur sub team for sacrifice.