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 :

• S45 Oblivion Ward

  Increases Max. HP by 3% and Max. CP by 6%.
• S11 Wood Spirit's Bow

  Increase critical chance 13%.
• Scroll: Kinjutsu I
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• Dark World Hammer
• Flag: Dragon Symbol
• Toxic Village Poison Potion
• Turkey Tail
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• S65 Transcendent Flame Wings

  Remnants of a powerful fire spirit. Increases attack damage by 7% and increase 20% Combustion chance. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• 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%.
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Scroll: Red Curse seal
• Lovely Santa Bag

  A bag that resembles Santa Claus, it emanates faint revitalizing aura. Restores 140 HP and 30 CP at the start of every turn.
• Ninja Bag

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

  An ancient enchanted bow with great range used in warfare. Increases accuracy by 10%. Restore 100 HP every turn.
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Blue Shell
• S38 Genrei Fan

  Increase max.CP by 50% but reduce max. HP by 20%.
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• Great Wooden Hammer (3 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Iron Tortoise Shell

  Reduce damage taken by 200.
• S10 Frostguard's Bow

  A magical bow that has a very long range. Reduce target 8% CP on every weapon attack.
• 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.
• GM back item
• Paper Windmill

  Additional 20 HP damage upon all attack.