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 :

• S10 Kikyo Umbrella

  6% chance to convert damage taken to HP positively.
• Karasu Miya Falcon

  Increase dodge rate by 6%.
• Soul of Egg Hunting Beast

  2012 Egg Hunting Event
• Mech of Wing

  Reduce damage taken by 10%.
• Golden-bound Cudgel
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• Chromaflake

  Increases damage by 5% and dodge rate by 3%.
• Sakura Straw Hat

  Recovers 2% of users max HP every turn.
• Zombie Hand

  Increase attack damage by 15%. But each turn reduce 200 HP and 300 CP.
• Yatai Lantern
• Ichimoku Gourd
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• 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%.
• Christmas Treasure Bag

  Increase agility by 1.
• 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.
• Ronin Idol

  Reduce damage taken by 100 and restores 4% of users max HP.
• 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.
• Star Dawn Harp

  Increases users agility by 1. Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover HP by 2% when being put on a debuff.
• Charming Aura (Black)

  2012 Valentines day limited aura, increase critical chance 2%.
• Green Koi
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Wine Gourd
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.
• Mischievous Candy

  Increase accuracy by 3%. Increase healing power of scrolls by 50%.
• S62 Black Steel Swords

  Restores 5% of users max HP.
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Sealing the soul barrel