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 :

• Engagement Ring

  Additional 20 HP damage upon all attack.
• Seal Nightmare Wing

  Ignore 4% targets dodge.
• Love Ribbon

  Additional 40 HP damage upon all attack.
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• Decorative Rope
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Ultimate Taiko

  Recover 120 HP at the start of every turn. Has 15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Karasu Miya Falcon

  Increase dodge rate by 6%.
• Grand Light Gourd

  Increase 3% damage
• Senior Kari Bagpack

  Reduce 3% damage taken.
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Gummy Bear

  Restores CP by 2%. Reduce damage taken by 100.
• Sealing Pot

  Increases Max. HP by 4% and recover 3% HP at the start of every turn.
• Cheerful Snowman

  Increase Max. CP by 20%. Recover 2% HP at the start of every turn. but reduce max. HP by 12%.
• Gunbai: Gyoji
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• S45 Oblivion Ward

  Increases Max. HP by 3% and Max. CP by 6%.
• S26 Bashosen

  Increase 10% Combustion chance.
• Raccoon Tail
• S34 Wooden Name Tag

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S2 Ancient Bone Claw

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

  Recover 200 HP and 200 CP at the start of every turn but reduce agility by 10.
• Sagittarius Hunting Set

  Increases dodge rate by 4%. Additional 80 HP damage on all attacks.
• Wooden Repeating Crossbow
• Silver Torch of Zeus

  Increase mission gold reward by 300.