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 :

• Yolanda Rescue First Aid Kit
• S23 Meschiken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Smoothbore Musket

  Increase 10% damage.
  Reduce 3% damage taken.
• Seal Nightmare Wing

  Ignore 4% targets dodge.
• Bell of Beast

  Recover HP by 3%. 15% chance to absorb 3% HP of enemy who attack you.
• Mirror of Thousand Hands
• Scroll: Guren
• Mini Scroll
• S28 Orochi Statue

  Increase attack damage by 4%, and recover HP by 1%.
• Drum: Ako
• Lovely Santa Bag

  A bag that resembles Santa Claus, it emanates faint revitalizing aura. Restores 140 HP and 30 CP at the start of every turn.
• Black Koi
• Little Shikigami

  Increases accuracy by 5%. Adds 80 damage in all of your attacks.
• Flag: Dragon Symbol
• Fighting spirit Taiko
• S16 Umbra Fire Wheel

  Additional 170 HP damage upon all attack.
• Sakura wah

  Restores HP by 3% and CP by 99 each turn.
• Nightmare Grudge

  Ignore 4% targets dodge.
• Minotaurs Horn

  Recover 350 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.
• Dual Blade of Fire

  Increase 3% damage made, recover self 2% HP each turn.
• Gold Wand

  Ignore 5% targets dodge.
• Purple Dragon umbrella
• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• S26 Bashosen

  Increase 10% Combustion chance.
• Jaws

  Ignore 4% targets dodge.
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• 4th Anniversary Back Item

  Ninja Saga 4th Anniversary edition! Recover 50 HP and 150 CP at the start of every turn.