I think I am now done with Ikuo in Matsuri Ver. I had what is essentially a perfect run (for my patterns), ending up with a score of 261,707,640, which meets my goal of 260+mil.
While in hindsight there were a few spots here and there I could have milked for a few more million, I got rather lucky with the boss patterns I was given in this run (including the last Pink Sweets boss, who gave me the bullet spiral pattern at least 4 times) and there is so much randomness in a Matsuri run that having it all come together and executing your patterns properly when it happens is very difficult. I put the replay up on Xbox live, as I don't think I'll be able to do much better than this and I'm very happy with my performance overall.
Now that this is done, I am going to go back to Ver 1.01 with Ikuo and try and get the top spot on the xbox live rankings (I'm currently about 10 million away). My ultimate goal is 430+ million. After that, I will probably go back and try and improve my Momo or Rafute scores.