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 :

• S4 Bladed Wings

  Reduce damage taken by 400. Recovers 1% of the user's max HP
• Toxic Village Poison Potion
• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• Jaws

  Ignore 4% targets dodge.
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• Death Wooden Coffin
• Wooden Hammer
• S54 Ebony Nunchaku

  Increases damage by 7%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Scroll: Double Head
• Mousetrap

  15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• S5 Umbrella of Spiritual Pulse

  Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover 5% CP every turn if current CP is less than 50%. Has 8% chance to reduce skill cooldown by 1 turn at the start of each turn. (Not effective on talent skills)
• Golden-bound Cudgel
• S15 Frozen Large Sword

  Increase 7% purify chance.
• Universal Backpack

  Increase healing power of scrolls by 100%. Each turn recover 140 HP.
• Civet Cat Tail
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• S51 Enchanted Winged Carapace

  Increases accuracy by 3%. Recover 4% HP at the start of every turn.
• MegaJingleBell

  A glorious Christmas artifact which can be used in battle. Ignores 5% of enemys dodge rate. Recovers 2% of users max HP every turn.
• S50 Blood Shade Magatama

  Created with blood and molten lava, the blood shade magatama consumes the life force of anyone with malicious intent. Has a 8% chance to absorb 10% of the attackers max HP and 8% chance to convert any damage taken to HP.
• Yolanda Rescue First Aid Kit
• Axe Hammer suit

  Increases damage and accuracy by 6%. Recover 50 HP at the start of every turn.
• Water Energy Skis
• Gummy Bear

  Restores CP by 2%. Reduce damage taken by 100.
• Charmed Heart

  Theres no escaping love. Increases accuracy by 5%. Adds 40 damage in all of your attacks.
• Scroll: Kinjutsu I
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.
• Christmas Treasure Bag

  Increase agility by 1.