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 :

• Chakra Kanawa

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Stuff Bunny

  Increase Max. HP by 2% and Max. CP by 4%.
• Magical Wreath

  Recover HP by 2% and reduce 4% damage taken.
• Evil Claw Hammer

  Reduce 7 HP damage taken.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• S16 King Kong Ring

  Recover HP by 1% and reduces damage received by 4%.
• Decorative Rope
• Christmas Bag

  Reduce damage taken by 10.
• Tai Chi Gold Gourd

  Restores HP by 4%. Increase healing power of scrolls by 500%. Reduce target 3% CP on every weapon attack.
• Ukon Three Blades
• Dark World Hammer
• Holy Wings

  Increase accuracy by 4% and dodge rate by 3%.
• Turkey Balloon

  Reduce damage taken by 7%. Recover 10% extra CP when charge.
• Force of Taotie

  Reduce damage taken by 7%.
• Christmas Treasure Bag

  Increase agility by 1.
• 2011 Fortune Lantern

  Ninja Saga 2nd Anniversary Carnival!
• Straw Hat

  Increase dodge rate by 3%.
• S34 Wooden Name Tag

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Ichimoku Gourd
• Thanksgiving Candle

  Has 15% chance to absorb 2% HP of enemy who attack you. Increase 7% Combustion chance.
• Four-Point Shuriken
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• Black Metal Hammer
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• Giant Copper Coins

  Increase Mission gold reward by 30%.(Mission Only)
• Hanagara Hagoita

  Increase max. HP by 3%.
• Spinning Wheel

  Recover user's max HP by 1% each turn. Increases user's max CP by 2%. Converts 10% of damage taken into CP.