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 :

• S13 Kishu Twin Blades

  Increase accuracy by 8%
• Scroll: Tenku
• Charming Aura (Pink)

  2012 Valentines day limited aura, reduce damage 2%.
• Big Cheese

  Recover CP after HP reduction. (Amount: 10% of HP reduction)
• 2011 Carnival Jiegu

  Ninja Saga 2nd Anniversary Carnival! Each turn recover 100 HP and 100 CP.
• S64 Twin Pinnacle Spear

  Powerful spears that can pinpoint enemy's weaknesses. Increases accuracy by 12%. But reduce self dodge rate by 5%.
• Water Energy Skis
• Tailed Beast Chakra Crystal

  Increase 3% damage.
  Reduce 3% damage taken.
  Recover 2% HP each turn start.
• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• S22 Shinnoto Monks Staff

  Increase 4% critical rate and reduces damage received by 4%.
• Mercy Of Libra

  Recover 2% HP at the start of every turn. And recover 3% HP with every Charge.
• Knot of Avenger

  20% chance to absorb 2% HP of enemy who attack you. 20% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Great Stinger

  Reduces damage taken by 3%. Converts 9% of damage taken into CP.
• Ultimate Taiko

  Recover 120 HP at the start of every turn. Has 15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Shigu Twin Blades
• Blood Brush

  Increase 3% damage and increase healing power of scrolls by 10%.
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• S11 Wood Spirit's Bow

  Increase critical chance 13%.
• Aries Taiko

  A magical taiko used in celebrations during the Aries zodiac months. Recovers 50 HP every turn and reduces damage taken by 25.
• Fairy Fishing Rod

  Each turn recover 3% HP and 100 CP
• Aboriginal Hunting Set

  Increase accuracy by 5% and Combustion chance 6%.
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• Tail of Jyubi

  Forged with chakra of the legendary tailed beast, Jyubi. Increase attack damage by 15% but reduce max. CP by 30%.
• Evil Claw Hammer

  Reduce 7 HP damage taken.
• S32 Black Senbu

  Recover HP by 4% and reduces damage received by 3%.
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• Black Double Gun

  Ignore enemys dodge rate by 3%. Increase accuracy by 3%.