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 :

• Black Koi
• S42 Hanbing Hammer

  8% chance to convert damage taken to HP positively.
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• S8 Sign of Corruption

  Wings with an ominous aura. Increases agility by 3.
• Angel Wings

  Increase 3% attack damage and ignore 3% targets dodge.
• Harvest Treasure Bag

  Reduce damage taken by 140. Recover 5% extra CP when charge.
• Curved Spear
• Matsuyama Fan

  Ignore enemys dodge rate by 6%.
• Turkey Balloon

  Reduce damage taken by 7%. Recover 10% extra CP when charge.
• Dark Blade

  Increase 2% critical rate and ignore 2% of targets dodge.
• Orange Koi
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• S2 Scroll Capsule

  Increase attack damage by 8%. Recover 7% cp after dealing damage.
• Mirror of Thousand Hands
• Shishimai Back

  Restores 3% of users max HP.Has 4% chance to convert damage taken to HP positively.
• Flame Blade Raijinco
• S67 Omni Cloud

  Increase accuracy by 6% and dodge rate by 5%.
• S58 Scroll of Shadows

  Increases damage by 6% and dodge rate by 5%.
• Hanami Taiko

  2011 Hanami Festival - Rhythm! Recover HP & CP by 10 every turn.
• Tai Chi Gold Gourd

  Restores HP by 4%. Increase healing power of scrolls by 500%. Reduce target 3% CP on every weapon attack.
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• S65 Transcendent Flame Wings

  Remnants of a powerful fire spirit. Increases attack damage by 7% and increase 20% Combustion chance. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.
• S13 Kishu Twin Blades

  Increase accuracy by 8%
• Vertical Light

  Reduce 15 HP damage taken.
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.