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 :

• Love of coffee

  Prepared with love and empathy. Recovers 100 HP every turn. Increases attack damage by 4%.
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• Ferret Tail
• Three Ring Magatama

  Increase 2% accuracy.
  Additional 12 HP damage upon all attack.
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Basic Jounin Battle Gear
• S73 Smite Evil Shield

  Has 25% chance to absorb 2% HP of enemy who attack you. 8% chance to convert damage taken to HP positively.
• S53 Frostfire Soul

  Increases combustion chance by 15%. Has a 10% chance to freeze enemies who attacks the user for 1 turn. Frozen targets cannot act but takes 80% reduced damage.
• Spiked Blade

  Increases dodge and critical chance by 4%. Recovers 70 HP each turn.
• Dark Plate Twin Blades
• New Year Kadomatsu

  Recover 100 HP and 100 CP at the start of every turn.
• Fairy Wings

  Fairy wings that owned by a fairy
• Heian-kyo Shamisen
• Dark Blade

  Increase 2% critical rate and ignore 2% of targets dodge.
• Scroll: Posion Attack
• Scroll: Fire and Earth
• Musashi Twin Blades
• Decorate Battle Umbrella
• Curved Spear
• Yawata Magatama

  Increase 3% accuracy.
  Additional 20 HP damage upon all attack.
• Blue Pattern Skis
• Call of the Angel

  Reduce damage taken by 100. Has 6% chance to convert damage taken to HP positively.
• S18 Evil Spirit Wings

  Increase 10% critical rate.
• Raccoon Tail
• S44 Earth Caller

  Increases attack damage by 4% and max HP by 5%.
• S14 Profound Tentacles

  35% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.