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 :

• Banana Back Item

  Banana Back Item
• S80 Struggle Flag

  Recover HP by 2%. Recover 7% HP with every Charge.
• Drum: Ako
• Charmed Heart

  Theres no escaping love. Increases accuracy by 5%. Adds 40 damage in all of your attacks.
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• Ninja Bag

  Increase healing power of scrolls by 20%.
• S61 God Dragon Flag

  Increase critical rate by 6%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Yawata Magatama

  Increase 3% accuracy.
  Additional 20 HP damage upon all attack.
• S57 Magatama Gunbai

  Increases dodge rate by 5% and restores 4% of users max HP every turn.
• Cupid Wing

  Increase critical chance 4% and critical damage 10%.
• Trident
• S43 Extreme Lotus

  The back item contains 30% chance to absorb 3% HP of enemy which makes attack on you.
• Fairy Wings

  Fairy wings that owned by a fairy
• Death Wooden Coffin
• S3 Fossil of Magatama

  Increase purify chance by 6%. Has 10% chance to convert damage taken to HP positively.
• 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)
• S70 Magical Cobweb

  Restores CP by 3%. 30% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• S41 Dragon Gunnery

  Increase 25% Combustion chance, Ignore enemys dodge rate by 5%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Karasu Miya Falcon

  Increase dodge rate by 6%.
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• Choco Tama

  Increase accuracy by 5% and increase healing power of scrolls by 25%.
• Iron Tortoise Shell

  Reduce damage taken by 200.
• Scroll: Rikugo
• Mirror of Shamisen
• S20 Empire Battle Gear

  6% chance to convert damage taken to HP positively.