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 :

• Puppet: Spider
• Scroll: Double Head
• 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.
• S18 Evil Spirit Wings

  Increase 10% critical rate.
• S75 Trifecta Swords

  It gives off a strange feeling of vigor. Restores CP by 3%. Increases max CP by 7%.
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• Tail of Hachibi

  Forged with chakra of the legendary tailed beast, Hachibi. Increase critical chance by 15% but reduce max. HP by 20%.
• Scroll: Messenger

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Black Koi
• White Guitar
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• Leopard Cat Tail
• Scroll: Kinjutsu I
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• Tail Hunter Back Item

  Increase max. HP by 3%.
• Ancient Pipe

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Four-Point Shuriken
• Christmas Trumpet

  Ignore enemys dodge rate by 4% and recover 3% CP with every charge.
• S2 Scroll Capsule

  Increase attack damage by 8%. Recover 7% cp after dealing damage.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• Matsuyama Fan

  Ignore enemys dodge rate by 6%.
• Smoothbore Musket

  Increase 10% damage.
  Reduce 3% damage taken.
• Yolanda Rescue First Aid Kit
• Red Ukiyo-e Kite

  4% chance to convert damage taken to HP positively and increase max. HP by 2%.
• Mother's Hug

  Recover 100 HP and 2% HP at the start of every turn.
• Yatai Lantern