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 :

• Sengoku Flag

  Increases damage by 4%. Each turn recover 120 HP.
• Gunbai: Gyoji
• S3 Fossil of Magatama

  Increase purify chance by 6%. Has 10% chance to convert damage taken to HP positively.
• Holiday Doll

  Expecting Santa in every year! Critical and dodge rate increase 3%.
• Dark Blade

  Increase 2% critical rate and ignore 2% of targets dodge.
• Roasted Turkey

  Restore 20 HP every turn.
• Gunbai: World Peace
• Wooden Repeating Crossbow
• Shadow Twin Blades
• S60 Amber Jewel Wings

  Increases attack damage by 10% and increase 5% Combustion chance.
• Flag: Dragon Symbol
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• S8 Sign of Corruption

  Wings with an ominous aura. Increases agility by 3.
• Blue Cloud Umbrella

  Ignore 6% targets dodge.
• Bat Back Item

  Back item design with reference from Halloween - Bats. Increase 5% dodge rate and decrease damage 5% at the same time.
• S5 Possessed Koto

  Increase purify chance by 7%. Reduce jutsu CP consumption for 10%. Has 15% Chance to stun target when attack with weapon for 1 turn.
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• Ritual Taiko
• Musashi Twin Blades
• Emblem backpack (Yellow)

  Double mission XP reward in level 1 to level 20.
• Soul of Egg Hunting Beast

  2012 Egg Hunting Event
• Red Ukiyo-e Kite

  4% chance to convert damage taken to HP positively and increase max. HP by 2%.
• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• Sakura Rain Battle Umbrella
• Ancient Shinobi War Decorated

  Additional 60 HP damage upon all attack.
• Engagement Ring

  Additional 20 HP damage upon all attack.
• Spartan Shield

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