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 :

• 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.
• FIFA Whistle

  Recover 100 CP at the start of every turn and reduces damage taken by 80.
• GM Phone

  GM Phone
• S45 Oblivion Ward

  Increases Max. HP by 3% and Max. CP by 6%.
• Carp Flag
• Black Silver Electric Guitar
• S75 Trifecta Swords

  It gives off a strange feeling of vigor. Restores CP by 3%. Increases max CP by 7%.
• S16 Umbra Steel Wheel

  Reduce damage taken by 270.
• Great Wooden Hammer

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Sakura Straw Hat

  Recovers 2% of users max HP every turn.
• Christmas Wreath

  Increase agility by 1 and Max HP by 1%.
• S10 Frostguard's Bow

  A magical bow that has a very long range. Reduce target 8% CP on every weapon attack.
• Prestige Purple Dragon

  Increase attack damage by 5%. Recover 100 HP at the start of every turn.
• Colorful Moai Egg

  Reduce damage taken by 100 and recover 10% extra CP when charge.
• S53 Frostfire Soul

  Increases combustion chance by 15%. Has a 10% chance to freeze enemies who attacks the user for 1 turn. Frozen targets cannot act but takes 80% reduced damage.
• Mirror of Shamisen
• Dark Plate Twin Blades
• S11 Wood Spirit's Shield

  Increase max. HP by 9% and 20% chance to absorb 3% HP of enemy who attack you.
• Blue Bird Wings
• White Metal Hammer
• Curved Spear
• S74 Burning Wings

  Increases attack damage by 4% and Combustion chance by 25%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Dark Blade

  Increase 2% critical rate and ignore 2% of targets dodge.
• S8 Underworld Bulwark

  A phantom shield with demon soul. Reduce damage taken by 10%.
• Venom Ghost

  Has 5% chance to convert damage taken to HP positively. Recover HP by 100 every turn.
• Chakra Kanawa

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Scroll: Genbu