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 :

• Tailed Beast Chakra Crystal

  Increase 3% damage.
  Reduce 3% damage taken.
  Recover 2% HP each turn start.
• Scroll and Blade

  Has 11% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills. Increase critical rate by 5%. 8% chances of using Jutsu without CP.
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• Ghost Spider

  Reduce 72 HP damage taken.
• Black Double Gun

  Ignore enemys dodge rate by 3%. Increase accuracy by 3%.
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• Steel Frame Tail
• S5 Umbrella of Spiritual Pulse

  Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover 5% CP every turn if current CP is less than 50%. Has 8% chance to reduce skill cooldown by 1 turn at the start of each turn. (Not effective on talent skills)
• Scroll: Double Head
• Thanksgiving Balloons

  Increase max. HP by 2%.
• Scroll: Messenger

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• S63 Stormbringer

  Increases dodge rate by 5%. Has 50% chance to absorb 2% HP of enemy who attack you.
• Red Shell
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.
• Businessman Luggage
• Radish Launcher

  It will fly you to the moon! (Easter 2011 Limited Edition)
• Santa Gift Bag

  Reduce damage taken by 30.
• Champion Cup!

  Ultimate prize for Champions.
• GM Goldfish

  GM Goldfish
• S72 Hero Twin Axe

  Increase 12% Combustion Chance and recover 3% HP at the start of every turn. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Huginn & Muninn

  Reduce 4% damage taken. Has 10% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Mimosa
• S41 Dragon Gunnery

  Increase 25% Combustion chance, Ignore enemys dodge rate by 5%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Fairy Wings

  Fairy wings that owned by a fairy
• Toxic Village Poison Potion
• S2 Demons erosion

  Recovers 4% of the users max HP every turn. Additional 100 damage on all attacks.