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 :

• Angel Heart (Black)

  Reduce target 8% CP on every weapon attack.
• Spartan Shield

  Restore 100 HP every turn. Reduce damage taken by 5%.
• Christmas Deer

  Increase critical chance 2% and critical damage 6%.
• Love of coffee

  Prepared with love and empathy. Recovers 100 HP every turn. Increases attack damage by 4%.
• S41 Dragon Gunnery

  Increase 25% Combustion chance, Ignore enemys dodge rate by 5%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Umiyuki Painted Wood

  Reduce 24 HP damage taken.
• Ukon Three Blades
• Fairy Wings

  Fairy wings that owned by a fairy
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• S59 Rejuvenating Blade Wings

  Increases Max. HP by 6% and Max. CP by 4%.
• Puppet: Hakuki (3 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• Tail Hunter Back Item

  Increase max. HP by 3%.
• Sand Gourd
• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every charge.
• S17 Scorching Sun Scroll

  Has 30% chance to absorb 1% HP of enemy who attack you.
• Crimson Lanterns

  Increase attack damage by 6%. Has 6% chance to convert damage taken to HP positively.
• Little Shikigami

  Increases accuracy by 5%. Adds 80 damage in all of your attacks.
• Holiday Doll

  Expecting Santa in every year! Critical and dodge rate increase 3%.
• S12 Ancient Blood Evil Gourd

  Increase max. HP by 5%. But reduce Max.CP by 1%.
• Brilliant Stock Pot

  Increase max. HP by 8% and purify chance by 2% but reduce max. CP by 8%.
• Stuff Bunny

  Increase Max. HP by 2% and Max. CP by 4%.
• Frost Soul Electric Guitar
• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• Puppet: Hakuki (7 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.