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 :

• Dark World Hammer
• Mini Scroll
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.
• Angel Heart (White)

  16% chance to absorb 2% HP of enemy who attack you.
• Senior Kari Bagpack

  Reduce 3% damage taken.
• Swire Raijinco
• Ichimoku Gourd
• Christmas Bag

  Reduce damage taken by 10.
• Dark Secret Seal

  Increases critical chance by 4%. Has 12% chance to Restrict anyone who attacks the user.
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• Carrot Launcher

  Increase agility by 1. (Easter 2011 Limited Edition)
• Skull Twins

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

  GM Phone
• S52 Gold Dragon Scroll

  Reduce damage taken by 7%. Ignore targets dodge rate by 5%.
• Native Horn

  Increase max. CP by 3%, Recover 1% HP with every Charge.
• Decorate Battle Umbrella
• Gold Wand

  Ignore 5% targets dodge.
• Puppet: Spider
• Butterfly Wings
• Light of Eternal

  Increase Max.HP 3%. Recover 3% SP at the start of every turn.
• S2 Ancient Bone Claw

  An ancient bone that emanates great power. Increases accuracy by 8%. Recovers 100 HP every turn.
• S15 Frozen Large Sword

  Increase 7% purify chance.
• Flour Stick
• Holy Wings

  Increase accuracy by 4% and dodge rate by 3%.
• Master Scroll

  Restores HP & CP by 3%.
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.