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 :

• Carp Flag
• Love Ribbon

  Additional 40 HP damage upon all attack.
• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Brilliant Stock Pot

  Increase max. HP by 8% and purify chance by 2% but reduce max. CP by 8%.
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• Gruidae Wing

  Each turn recover 80 CP. Recover CP after HP reduction. (Amount: 8% of HP reduction)
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Champion Cup!

  Ultimate prize for Champions.
• Decorate Battle Umbrella
• Ancient Shinobi War Decorated

  Additional 60 HP damage upon all attack.
• Super Rabbit Doll

  Increase damage by 9%.
• Justice and Freedom

  Flag of the United States of America which symbolizes freedom and liberty. Recover 3% HP with every charge. Increases critical rate by 3%. Reduces damage taken by 50.
• Cornucopia

  Increase healing power of scrolls by 100%. Has 6% chance to convert damage taken to HP positively.
• Toxic Spider Web

  10% chance to apply Restriction on enemies who attacks the user for 1 turn.
  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• Bear of Affection

  Increase dodge rate by 3% and ignore target dodge by 3%.
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Santa Gift Bag

  Reduce damage taken by 30.
• Great Wooden Hammer

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Puppet: Hakuki (7 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• S13 Ancient Kishu Twin Blades

  Increase accuracy by 6%
• Successor Fan

  Restores HP & CP by 2%. Has 7% chance to freeze enemy who attacks user (2 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Mischievous Candy

  Increase accuracy by 3%. Increase healing power of scrolls by 50%.
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• GM Phone

  GM Phone
• Iron Tortoise Shell

  Reduce damage taken by 200.