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 :

• Native Drum

  5% chance to convert damage taken to HP positively.
• S16 Umbra Fire Wheel

  Additional 170 HP damage upon all attack.
• Cornucopia

  Increase healing power of scrolls by 100%. Has 6% chance to convert damage taken to HP positively.
• S5 Possessed Koto

  Increase purify chance by 7%. Reduce jutsu CP consumption for 10%. Has 15% Chance to stun target when attack with weapon for 1 turn.
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• Water Energy Skis
• S13 Kishu Twin Blades

  Increase accuracy by 8%
• Butterfly Wings
• Heart Aura

  Hidden feelings emerges! Recovers 2% of the user's max HP and 100 HP every turn.
• Black Silver Electric Guitar
• Sand Gourd
• S23 Meschiken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S18 Evil Spirit Wings

  Increase 10% critical rate.
• Osuzu Shinsen

  Ninja Saga 2nd Anniversary Carnival! Increase all attack damage by 5%.
• Wine Gourd
• White Metal Hammer
• Hanagara Hagoita

  Increase max. HP by 3%.
• Sakon Three Blades
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• Drum of Euphoria

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

  Recover 120 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.
• Deadwood Pipa
• Mini Octopus
• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• S74 Burning Wings

  Increases attack damage by 4% and Combustion chance by 25%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Great Stinger

  Reduces damage taken by 3%. Converts 9% of damage taken into CP.
• Shoe of Bounty

  Increase dodge rate and critical rate by 4%.