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 :

• S4 Bladed Wings

  Reduce damage taken by 400. Recovers 1% of the user's max HP
• Celestial Wood Raijinco
• S14 Yabusa Knife

  Increases 4% attack damage and ignore 4% of targets dodge.
• S39 Spike Hammer

  Increase accuracy by 10% but reduce max. HP by 10%.
• S13 Kishu Twin Blades

  Increase accuracy by 8%
• Turkey Tail
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Ronin Idol

  Reduce damage taken by 100 and restores 4% of users max HP.
• Hanami Lantern

  2011 Hanami Festival - Shine! Reduce damage taken by 15.
• White Guitar
• S55 Mirror of Fantasy

  Increases damage by 6% and accuracy by 5%. Has a 7% chance to convert any damage taken to HP.
• First-Aid Kit

  100% of the purchase price will be donated to Japan earthquake relief.
• Master Scroll

  Restores HP & CP by 3%.
• Zombie Hand

  Increase attack damage by 15%. But each turn reduce 200 HP and 300 CP.
• Beast Mace
• Hanami Dango

  Reduces damage received by 7%. Restore 85 HP every turn.
• S31 Yabusa Dual Head Spear

  Increase 4% damage and 4% critical rate.
• Ice Cystal Raijinco
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• Toxic Mushroom

  Increases damage by 10% but the user takes 200 HP damage every turn.
• S54 Ebony Nunchaku

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

  Increase 5% Combustion chance and reduce 1% damage taken.
• Christmas Bag

  Reduce damage taken by 10.
• Bell of Beast

  Recover HP by 3%. 15% chance to absorb 3% HP of enemy who attack you.
• Christmas Treasure Bag

  Increase agility by 1.
• Magical Wreath

  Recover HP by 2% and reduce 4% damage taken.
• Heian-kyo Shamisen