That's all the distortions/sin monsters in Silver Tower done. I've got to say, I don't think a support character in any prequel/Sequel game has been quite as broken as Hazuki - she gets two two-turn binds per fight (Crowel gets one bind) so on anything that doesn't have double action it's possible to keep the boss from acting for the first six turns or to null its finisher three times.
Also, and I'm glad I caught this - I misunderstood a variable and thought you had to kill all 6 sin monsters to get into the final dungeon - you only need to take out one to get in, but all six to challenge the true final boss.