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 :

• Ferret Tail
• Gruidae Wing

  Each turn recover 80 CP. Recover CP after HP reduction. (Amount: 8% of HP reduction)
• Black Silver Electric Guitar
• Wooden Hammer
• Tail of Kyubi

  Forged with chakra of the legendary tailed beast, Kyubi. 100% immune to Burn effect and increase 3% Combustion chance.
• Ritual Taiko
• Thanksgiving Balloons

  Increase max. HP by 2%.
• Angel Heart (White)

  16% chance to absorb 2% HP of enemy who attack you.
• Dual Blade of Fire

  Increase 3% damage made, recover self 2% HP each turn.
• S57 Magatama Gunbai

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

  Recover 3% HP at the start of every turn, and recover 3% HP with every Charge.
• Minotaurs Horn

  Recover 350 HP at the start of every turn. Has 15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Magical Wreath

  Recover HP by 2% and reduce 4% damage taken.
• S40 Gozen Breeze Back Item

  Recover 7% HP with every Charge.
• Steel Frame Tail
• Blue Bird Wings
• Scroll: Double Head
• Tailed Beast Chakra Crystal

  Increase 3% damage.
  Reduce 3% damage taken.
  Recover 2% HP each turn start.
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• S59 Rejuvenating Blade Wings

  Increases Max. HP by 6% and Max. CP by 4%.
• Star Dawn Harp

  Increases users agility by 1. Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover HP by 2% when being put on a debuff.
• Turkey Balloon

  Reduce damage taken by 7%. Recover 10% extra CP when charge.
• Scroll: Fire and Earth
• GM Phone

  GM Phone
• Christmas Trumpet

  Ignore enemys dodge rate by 4% and recover 3% CP with every charge.
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.
• 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)