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 :

• White Guitar
• Shadow Twin Blades
• Charming Aura (Red)

  2012 Valentines day limited aura, increase all damage 2%.
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• Seal Nightmare Wing

  Ignore 4% targets dodge.
• Togatsuki Paper Fan

  Increase max. CP by 10%.
• Cerberus's Flame

  80% chance to burn enemy who attack user - Reduce 3% HP for 2 turns.
• Ocean Ring

  Increase 1% accuracy.
  Additional 2 HP damage upon all attack.
• S44 Earth Caller

  Increases attack damage by 4% and max HP by 5%.
• Assault Kite

  Recover 100 HP and 80 CP at the start of every turn.
• Scroll: Red Curse seal
• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• Death Wooden Coffin
• Gummy Bear

  Restores CP by 2%. Reduce damage taken by 100.
• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• S2 Solar Aura

  Increase agility by 3 and accuracy by 7% .
• Virgos Eternal Wings

  Increases agility by 1. Increases users attack damage by 3%.
• Enternal Love Scroll

  Increase 5% Combustion chance and reduce 1% damage taken.
• Patriot Aegis

  A mythical shield that can block even the most vicious attacks. Increases max HP by 3%. Has a 60% chance to recover 5% of maximum HP and reduces damage taken by 75.
• GM Goldfish

  GM Goldfish
• Decorate Battle Umbrella
• Engagement Ring

  Additional 20 HP damage upon all attack.
• Scroll: Grassland
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• Basic Jounin Battle Gear
• Great Wooden Hammer (7 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Native Horn

  Increase max. CP by 3%, Recover 1% HP with every Charge.