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 :

• S81 Wheel of Glory

  Reduce damage taken by 200. Increase Combustion chance by 15%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Raijin Raijinco
• Samurai Painted Wood

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• S15 Ancient Seitenken

  Recover CP after HP reduction. (Amount: 16% of HP reduction)
• S54 Ebony Nunchaku

  Increases damage by 7%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.
• S17 Scorching Sun Lantern

  Recover 10% cp after dealing damage.
• Mini Goldfish
• Mirror of Shamisen
• Mech of Wing

  Reduce damage taken by 10%.
• Trident
• Chakra Magatama

  Increase 2% accuracy.
  Additional 5 HP damage upon all attack.
• Smart Phone
• Tail of Hachibi

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

  Reduce damage taken by 7%.
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S2 Scroll Capsule

  Increase attack damage by 8%. Recover 7% cp after dealing damage.
• Great Wooden Hammer

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• Carrot Time Bomb

  Has 8% chance to freeze enemy who attacks user (1 turn). Frozen target cannot move but damage taken is reduced by 80%. Has 5% chance to convert damage taken to HP positively.
• Scroll: Rikugo
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Shoguns Badge Gourd

  Increase Max. HP & CP by 3%
• Cheerful Snowman

  Increase Max. CP by 20%. Recover 2% HP at the start of every turn. but reduce max. HP by 12%.
• Thorn hammer
• Blue Crystal Wings

  Recover 15% extra CP when charge.