At 1st level, a master of many styles can fuse two of the styles he knows into a more perfect style. The master of many styles can have two style feat stances active at once. Starting a stance provided by a style feat is still a swift action, but when the master of many styles switches to another style feat, he can choose one style whose stance is already active to persist. He may only have two style feat stances active at a time.
At 8th level, the master of many styles can fuse three styles at once. He can have the stances of three style feats active at the same time. Furthermore, he can enter up to three stances as a swift action.
At 15th level, the master of many styles can fuse four styles at once. He can have the stances of four style feats active at the same time. Furthermore, he can enter up to four stances as a free action by spending 1 point from his {i}ki{/i} pool. This ability replaces flurry of blows.
At 20th level, a master of many styles can have the stances of five style feats active at once, and can change those stances as a free action. This ability replaces perfect self.