You might as well compare with these Back Items so you can decide which Back Items you're gonna use for ninja Saga Pvp or in Hunting House for easier killing the boss or your opponent in ninja saga PvP
These Back Items might have better effect . Here we go :

• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Scroll: Terminated Rock
• S75 Trifecta Swords

  It gives off a strange feeling of vigor. Restores CP by 3%. Increases max CP by 7%.
• Holy Wings

  Increase accuracy by 4% and dodge rate by 3%.
• Three Ring Magatama

  Increase 2% accuracy.
  Additional 12 HP damage upon all attack.
• S13 Ancient Kishu Twin Blades

  Increase accuracy by 6%
• Radish Launcher

  It will fly you to the moon! (Easter 2011 Limited Edition)
• Seal Nightmare Wing

  Ignore 4% targets dodge.
• Puppet: Hakuki (3 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• Gunbai: Gyoji
• Paper Windmill

  Additional 20 HP damage upon all attack.
• S3 Energetical Can

  Increase attack damage by 10% and Combustion chance by 18%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Blue Pattern Skis
• Water Symbol Guitar
• S7 Gorgeous Butterfly

  Increase agility by 2. Recover 20% extra CP when charge.
• Blue Bird Wings
• Mirror of Thousand Hands
• Sakura Fan

  Recover 20 HP and 150 CP at the start of every turn.
• Dual Blade of Fire

  Increase 3% damage made, recover self 2% HP each turn.
• Sakura Straw Hat

  Recovers 2% of users max HP every turn.
• Scroll: Grassland
• Matsuyama Fan

  Ignore enemys dodge rate by 6%.
• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• Love of coffee

  Prepared with love and empathy. Recovers 100 HP every turn. Increases attack damage by 4%.
• Universal Saber

  Increases users agility by 1. Recover 150 HP at the start of every turn.
• Scroll: Messenger (3 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.