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 :

• Steel Frame Tail
• Merlins Magical book

  Increases attack damage 5%
• S1 Helianthus

  Restores HP & CP by 5%. Increase purify chance by 5%.
• Skull Twins

  7% chance to convert damage taken to HP positively and 20% chance to absorb 1% HP of enemy who attack you.
• Python Scales Raijinco
• Celestial Wood Raijinco
• Mech of Wing

  Reduce damage taken by 10%.
• S8 Underworld Bulwark

  A phantom shield with demon soul. Reduce damage taken by 10%.
• S2 Scroll Capsule

  Increase attack damage by 8%. Recover 7% cp after dealing damage.
• Ice Cystal Raijinco
• Carnival Fan

  Dance with the Fan during Ninja Saga Anniversary Carnival! Increase all attack damage by 3%.
• Golden-bound Cudgel
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.
• S31 Yabusa Dual Head Spear

  Increase 4% damage and 4% critical rate.
• Water Energy Skis
• Thanksgiving Balloons

  Increase max. HP by 2%.
• Sakura Gold Jewellery

  Increases users agility by 1. Restores 3% of users max HP. Has 6% chance to convert damage taken to HP positively.
• S19 Magatama Soul Barrel

  Increase 4% critical rate and ignore 4% targets dodge.
• Tailed Beast Chakra Crystal

  Increase 3% damage.
  Reduce 3% damage taken.
  Recover 2% HP each turn start.
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• Chromaflake

  Increases damage by 5% and dodge rate by 3%.
• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• Turkey Balloon

  Reduce damage taken by 7%. Recover 10% extra CP when charge.
• Scroll: Posion Attack
• Flour Stick
• Ritual Taiko