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 :

• S39 Spike Hammer

  Increase accuracy by 10% but reduce max. HP by 10%.
• Skull Twins

  7% chance to convert damage taken to HP positively and 20% chance to absorb 1% HP of enemy who attack you.
• Scroll: Double Head
• S56 Curse Brush

  A legendary Ink Brush that has the ability to materialize drawings. Increase critical rate by 5% and accuracy by 6%.
• Chromaflake

  Increases damage by 5% and dodge rate by 3%.
• S42 Hanbing Hammer

  8% chance to convert damage taken to HP positively.
• Village Red Lantern
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Celestial Wood Raijinco
• Force of Taotie

  Reduce damage taken by 7%.
• Angel Heart (Black)

  Reduce target 8% CP on every weapon attack.
• Sakura Dance

  Increase damage by 3% and max. HP by 4%.
• Dark Secret Seal

  Increases critical chance by 4%. Has 12% chance to Restrict anyone who attacks the user.
• Raijin Raijinco
• Flame Soul Electric Guitar
• Sand Gourd
• Peom Fan

  Reduce 46 HP damage taken.
• Wood Top
• Firefox Tail
• Businessman Luggage
• Enternal Love Scroll

  Increase 5% Combustion chance and reduce 1% damage taken.
• Puppet: Hakuki

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

  Additional 60 HP damage upon all attack.
• Turkey Tail
• Champion Cup!

  Ultimate prize for Champions.
• S32 Black Senbu

  Recover HP by 4% and reduces damage received by 3%.
• S13 Ancient Kishu Twin Blades

  Increase accuracy by 6%