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 :

• S14 Yabusa Knife

  Increases 4% attack damage and ignore 4% of targets dodge.
• Python Scales Raijinco
• S56 Curse Brush

  A legendary Ink Brush that has the ability to materialize drawings. Increase critical rate by 5% and accuracy by 6%.
• Clear Cross

  Increase 3% purify chance. Each turn recover 150 HP and 150 CP.
• 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.
• GM Goldfish

  GM Goldfish
• FIFA Whistle

  Recover 100 CP at the start of every turn and reduces damage taken by 80.
• S34 Wooden Name Tag

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S4 Bladed Wings

  Reduce damage taken by 400. Recovers 1% of the user's max HP
• Water Energy Skis
• Black Metal Hammer
• S8 Ancient Scroll of Golden Snake

  Increase all attack damage by 4%, and Decrease damage taken by 4%. But reduce critical chance by 1%.
• S10 Frostguard's Bow

  A magical bow that has a very long range. Reduce target 8% CP on every weapon attack.
• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• Large Wooden Hammer
• Hanami Fan

  Ignore 4% targets dodge and increase max. HP by 2%.
• Musashi Twin Blades
• Spirit Flag

  An inspiring banner that boosts the holders morale. Increase critical chance and dodge rate by 3%.
• Skull Twins

  7% chance to convert damage taken to HP positively and 20% chance to absorb 1% HP of enemy who attack you.
• Ocean Ring

  Increase 1% accuracy.
  Additional 2 HP damage upon all attack.
• Deadwood Pipa
• Iron Tortoise Shell

  Reduce damage taken by 200.
• Great Stinger

  Reduces damage taken by 3%. Converts 9% of damage taken into CP.
• Dark Blade

  Increase 2% critical rate and ignore 2% of targets dodge.
• Hidden Green Umbrella
• S2 Ancient Bone Claw

  An ancient bone that emanates great power. Increases accuracy by 8%. Recovers 100 HP every turn.
• Universal Saber

  Increases users agility by 1. Recover 150 HP at the start of every turn.