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 :

• Ice Cystal Raijinco
• Sagittarius Hunting Set

  Increases dodge rate by 4%. Additional 80 HP damage on all attacks.
• Gummy Bear

  Restores CP by 2%. Reduce damage taken by 100.
• S2 Scroll Capsule

  Increase attack damage by 8%. Recover 7% cp after dealing damage.
• Great Wooden Hammer (7 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Flag: Dragon Symbol
• Raccoon Tail
• Hanagara Dama

  Increase max. CP by 6%
• Sand Gourd
• Engagement Ring

  Additional 20 HP damage upon all attack.
• Call of the Angel

  Reduce damage taken by 100. Has 6% chance to convert damage taken to HP positively.
• Flag of the Burning Legion

  Reduce 3% damage taken and 12% chance to absorb 2% HP of enemy who attack you.
• Christmas Treasure Bag

  Increase agility by 1.
• Blizzard

  Increases users agility by 1. Has 7% chance to convert damage taken into HP.
• Flour Stick
• S63 Stormbringer

  Increases dodge rate by 5%. Has 50% chance to absorb 2% HP of enemy who attack you.
• Cursed Devil

  Increase attack damage by 15%. But reduce max. HP and max. CP by 10%
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• Hidden Green Umbrella
• Red Shuriken Skis
• S10 Frostguard's Shield

  Shield of the valiant warrior Tundra. Increase agility by 2. Has 17% Chance to stun target when attack with weapon for 1 turn.
• Sealed Wood

  A back item which lost the original effectiveness.
• Extra Large Presents Bag

  A large present bag, but nobody knows what it contains.
• Bell of Fortune

  6% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Falcon
• Heian-kyo Shamisen