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 :

• Water Symbol Guitar
• S13 Ancient Kishu Twin Blades

  Increase accuracy by 6%
• S55 Mirror of Fantasy

  Increases damage by 6% and accuracy by 5%. Has a 7% chance to convert any damage taken to HP.
• S76 Buckler and Sword

  Increase max.HP by 12% but reduce max. CP by 2%.
• S2 Ancient Bone Claw

  An ancient bone that emanates great power. Increases accuracy by 8%. Recovers 100 HP every turn.
• S2 Scroll Capsule

  Increase attack damage by 8%. Recover 7% cp after dealing damage.
• Falcon
• S2 Solar Aura

  Increase agility by 3 and accuracy by 7% .
• Civet Cat Tail
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• Hanami Taiko

  2011 Hanami Festival - Rhythm! Recover HP & CP by 10 every turn.
• Great Wooden Hammer (7 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• S1 Angelic Silverware

  Increase dodge rate by 5%. Reduce damage taken by 9%.
• Wood Top
• Carp Flag
• S9 Warring Empire Bulwark

  A strong and sturdy shield. Reduces damage taken by 35% but reduces the user's agility by 15.
• Flour Stick
• S42 Hanbing Hammer

  8% chance to convert damage taken to HP positively.
• Ferret Tail
• Iron Tortoise Shell

  Reduce damage taken by 200.
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• S64 Twin Pinnacle Spear

  Powerful spears that can pinpoint enemy's weaknesses. Increases accuracy by 12%. But reduce self dodge rate by 5%.
• S29 Yanki Protective Magatama

  Increase accuracy by 8%
• Celestial Wood Raijinco
• Hanagara Hagoita

  Increase max. HP by 3%.
• Wind Storm Raijinco
• Puppet: Hakuki

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.