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 :

• Nutcracker

  Increases Max. HP by 4% and damage by 3%.
• Black Koi
• S3 Energetical Can

  Increase attack damage by 10% and Combustion chance by 18%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Bat Back Item

  Back item design with reference from Halloween - Bats. Increase 5% dodge rate and decrease damage 5% at the same time.
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• S29 Yanki Protective Magatama

  Increase accuracy by 8%
• Charming Aura (Red)

  2012 Valentines day limited aura, increase all damage 2%.
• Ninja Bag

  Increase healing power of scrolls by 20%.
• Raijin Raijinco
• S9 Warring Empire Guarding Bow

  An ancient enchanted bow with great range used in warfare. Increases accuracy by 10%. Restore 100 HP every turn.
• Flame Blade Raijinco
• Golden Torch of Zeus

  Recover 150 HP every turn
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.
• S20 Empire Battle Gear

  6% chance to convert damage taken to HP positively.
• Chakra Magatama

  Increase 2% accuracy.
  Additional 5 HP damage upon all attack.
• Hanami Dango

  Reduces damage received by 7%. Restore 85 HP every turn.
• Scroll: Grassland
• S4 Bladed Wings

  Reduce damage taken by 400. Recovers 1% of the user's max HP
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%.
• Ghost Spider

  Reduce 72 HP damage taken.
• S70 Magical Cobweb

  Restores CP by 3%. 30% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Toxic Village Poison Potion
• S10 Frostguard's Bow

  A magical bow that has a very long range. Reduce target 8% CP on every weapon attack.
• S61 God Dragon Flag

  Increase critical rate by 6%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.