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 :

• Giant Copper Coins

  Increase Mission gold reward by 30%.(Mission Only)
• Blessed Kitty

  Bless on his master everyday, which increase 3% damage. Heal 1% HP in every turn.
• Dark Plate Twin Blades
• S56 Curse Brush

  A legendary Ink Brush that has the ability to materialize drawings. Increase critical rate by 5% and accuracy by 6%.
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.
• Seal Nightmare Wing

  Ignore 4% targets dodge.
• Blue Shell
• S3 Energetical Can

  Increase attack damage by 10% and Combustion chance by 18%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Dark Secret Seal

  Increases critical chance by 4%. Has 12% chance to Restrict anyone who attacks the user.
• Great Wooden Hammer (3 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• War Flag: World Peace
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Ukon Three Blades
• Angel Heart (White)

  16% chance to absorb 2% HP of enemy who attack you.
• Puppet: Hakuki

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• S63 Stormbringer

  Increases dodge rate by 5%. Has 50% chance to absorb 2% HP of enemy who attack you.
• Businessman Luggage
• S1 Angelic Silverware

  Increase dodge rate by 5%. Reduce damage taken by 9%.
• Scroll: Red Curse seal
• Sack of Hearts

  Cupids sack of hearts. Recovers 3% HP every turn. Has 5% chance to convert any damage to HP.
• Venom Ghost

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

  Increase 1% damage. Recover 3% HP with every Charge.
• Blue Pattern Skis
• Scroll: Messenger (3 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• War Flag: Furinkazan
• Virgos Eternal Wings

  Increases agility by 1. Increases users attack damage by 3%.
• Folding Paper Fan