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 :

• S44 Earth Caller

  Increases attack damage by 4% and max HP by 5%.
• S4 Bladed Wings

  Reduce damage taken by 400. Recovers 1% of the user's max HP
• S14 Ancient Yabusa Knife

  Increases attack damage 4% and ignore 3% of targets dodge.
• 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)
• Chakra Kanawa

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Heian-kyo Shamisen
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• S80 Struggle Flag

  Recover HP by 2%. Recover 7% HP with every Charge.
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• Sakura Straw Hat

  Recovers 2% of users max HP every turn.
• S59 Rejuvenating Blade Wings

  Increases Max. HP by 6% and Max. CP by 4%.
• S55 Mirror of Fantasy

  Increases damage by 6% and accuracy by 5%. Has a 7% chance to convert any damage taken to HP.
• Taurus Wand

  A necromantic wand with a figurehead of a bull. Used by necromancers in ancient times to amplify their power. Recover 100 HP at the start of every turn. Has a 12% chance to absorb 3% HP of enemies who attack you.
• S9 Akazonke Gunbai

  Increase 4% critical rate and ignore 4% targets dodge.
• Sack of Hearts

  Cupids sack of hearts. Recovers 3% HP every turn. Has 5% chance to convert any damage to HP.
• Ghost Spider

  Reduce 72 HP damage taken.
• Village Red Lantern
• Hanami Fan

  Ignore 4% targets dodge and increase max. HP by 2%.
• Angel Wings

  Increase 3% attack damage and ignore 3% targets dodge.
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• Knot of Avenger

  20% chance to absorb 2% HP of enemy who attack you. 20% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Call of the Angel

  Reduce damage taken by 100. Has 6% chance to convert damage taken to HP positively.
• S63 Stormbringer

  Increases dodge rate by 5%. Has 50% chance to absorb 2% HP of enemy who attack you.
• Successor Fan

  Restores HP & CP by 2%. Has 7% chance to freeze enemy who attacks user (2 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Cancer Assegai

  Increases critical rate by 4%. Reduce damage taken by 3%.
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• Great Wooden Hammer (3 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.