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 :

• Ocean Ring

  Increase 1% accuracy.
  Additional 2 HP damage upon all attack.
• Fighting spirit Taiko
• Scroll: Kochin
• Yatai Lantern
• White Metal Hammer
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• Firefox Tail
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• Giant Copper Coins

  Increase Mission gold reward by 30%.(Mission Only)
• Angel Heart (Black)

  Reduce target 8% CP on every weapon attack.
• S45 Oblivion Ward

  Increases Max. HP by 3% and Max. CP by 6%.
• Butterfly Wings
• Great Stinger

  Reduces damage taken by 3%. Converts 9% of damage taken into CP.
• Beast Mace
• S2 Ancient Bone Claw

  An ancient bone that emanates great power. Increases accuracy by 8%. Recovers 100 HP every turn.
• Red Ukiyo-e Kite

  4% chance to convert damage taken to HP positively and increase max. HP by 2%.
• Scroll: Fire and Earth
• Enternal Love Scroll

  Increase 5% Combustion chance and reduce 1% damage taken.
• Blue Shell
• 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.
• Scroll: Genbu
• S21 Rokulin Gunbai

  Ignore enemys dodge rate by 8%.
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Spirit Flag

  An inspiring banner that boosts the holders morale. Increase critical chance and dodge rate by 3%.
• Gunbai: World Peace
• Smart Phone
• Shoguns Badge Gourd

  Increase Max. HP & CP by 3%