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 :

• Mirror of Thousand Hands
• Light Cry Raijinco
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Sealing Pot

  Increases Max. HP by 4% and recover 3% HP at the start of every turn.
• Ghost Spider

  Reduce 72 HP damage taken.
• S5 The Guider

  Increase purify chance by 7%. Recover 8% HP when purify. Recovers 4% of the user's max HP.
• Wine Gourd
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• Choco Tama

  Increase accuracy by 5% and increase healing power of scrolls by 25%.
• Call of the Angel

  Reduce damage taken by 100. Has 6% chance to convert damage taken to HP positively.
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• Blue Wolf Tail
• Toxic Mushroom

  Increases damage by 10% but the user takes 200 HP damage every turn.
• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Roasted Turkey

  Restore 20 HP every turn.
• Iron Tortoise Shell

  Reduce damage taken by 200.
• Paper Envoy of God

  Increases attack damage and reduces damage received by 4%
• Trident
• Mini Scroll
• Decorative Rope
• Charming Aura (Pink)

  2012 Valentines day limited aura, reduce damage 2%.
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• S40 Gozen Breeze Back Item

  Recover 7% HP with every Charge.
• Ancient Pipe

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• S34 Wooden Name Tag

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S57 Magatama Gunbai

  Increases dodge rate by 5% and restores 4% of users max HP every turn.
• S16 Umbra Steel Wheel

  Reduce damage taken by 270.