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 :

• Four-Point Shuriken
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• Ocean Ring

  Increase 1% accuracy.
  Additional 2 HP damage upon all attack.
• Scroll: Kinjutsu I
• Love Ribbon

  Additional 40 HP damage upon all attack.
• Yawata Magatama

  Increase 3% accuracy.
  Additional 20 HP damage upon all attack.
• Seal Nightmare Wing

  Ignore 4% targets dodge.
• S41 Dragon Gunnery

  Increase 25% Combustion chance, Ignore enemys dodge rate by 5%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S8 Sign of Corruption

  Wings with an ominous aura. Increases agility by 3.
• S46 Holy Drum

  Reduce damage taken by 4%. Increase chance to restrict enemy for 1 turn by 20%. Targets with “Restriction” will not be able to use any skills.
• Bear of Affection

  Increase dodge rate by 3% and ignore target dodge by 3%.
• Little Shikigami

  Increases accuracy by 5%. Adds 80 damage in all of your attacks.
• Shinobi Curse Battle Umbrella
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.
• S54 Ebony Nunchaku

  Increases damage by 7%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Love of coffee

  Prepared with love and empathy. Recovers 100 HP every turn. Increases attack damage by 4%.
• S9 Warring Empire Bulwark

  A strong and sturdy shield. Reduces damage taken by 35% but reduces the user's agility by 15.
• 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.
• Emblem backpack (Yellow)

  Double mission XP reward in level 1 to level 20.
• White Metal Hammer
• Shishimai Back

  Restores 3% of users max HP.Has 4% chance to convert damage taken to HP positively.
• Spinning Wheel

  Recover user's max HP by 1% each turn. Increases user's max CP by 2%. Converts 10% of damage taken into CP.
• Deadwood Pipa
• Engagement Ring

  Additional 20 HP damage upon all attack.
• Python Scales Raijinco
• Cursed Devil

  Increase attack damage by 15%. But reduce max. HP and max. CP by 10%
• Roasted Turkey

  Restore 20 HP every turn.