In my opinion, Midnight Blade might be a better fit for your ninja lineup. If you decide to switch, I recommend upgrading Kimimaro to 3 stars and pairing him with Sasuke and Guy, or Sasuke and Kabuto. For Midnight Blade, the recommended skills are Sealing Slash, Lightning Assassination Sword, Lai Beheading, Intent of the Warrior/Lightning Enhancement, and Root of the Warrior.