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 :

• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Scroll: Posion Attack
• S70 Magical Cobweb

  Restores CP by 3%. 30% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Red Shuriken Skis
• Puppet: Hakuki (3 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• Three-stringed Lute Guitar
• Blessed Kitty

  Bless on his master everyday, which increase 3% damage. Heal 1% HP in every turn.
• Black Double Gun

  Ignore enemys dodge rate by 3%. Increase accuracy by 3%.
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• 4th Anniversary Back Item

  Ninja Saga 4th Anniversary edition! Recover 50 HP and 150 CP at the start of every turn.
• Swire Raijinco
• Village Red Lantern
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• Peom Fan

  Reduce 46 HP damage taken.
• Yawata Magatama

  Increase 3% accuracy.
  Additional 20 HP damage upon all attack.
• Mousetrap

  15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Sakon Three Blades
• Seal Nightmare Wing

  Ignore 4% targets dodge.
• Native Drum

  5% chance to convert damage taken to HP positively.
• S10 Kikyo Umbrella

  6% chance to convert damage taken to HP positively.
• Scroll: Guren
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• Matsuyama Fan

  Ignore enemys dodge rate by 6%.
• Heian-kyo Shamisen
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.
• Scroll: Messenger

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Ultimate Taiko

  Recover 120 HP at the start of every turn. Has 15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.