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 :

• Vertical Light

  Reduce 15 HP damage taken.
• Christmas Trumpet

  Ignore enemys dodge rate by 4% and recover 3% CP with every charge.
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• War Flag: World Peace
• Victorious Crown

  Increases accuracy by 4% and recover HP by 3%. Has 13% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• Radish Launcher

  It will fly you to the moon! (Easter 2011 Limited Edition)
• Holy Wings

  Increase accuracy by 4% and dodge rate by 3%.
• Aries Taiko

  A magical taiko used in celebrations during the Aries zodiac months. Recovers 50 HP every turn and reduces damage taken by 25.
• Green Koi
• Mirror of Thousand Hands
• Wings of Eternal Eclipse

  Increases critical chance by 3%. Ignores 6% of the targets dodge rate.
• Hanami Dango

  Reduces damage received by 7%. Restore 85 HP every turn.
• Sand Gourd
• GM back item
• S1 Angelic Silverware

  Increase dodge rate by 5%. Reduce damage taken by 9%.
• Falcon
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Ritual Taiko
• S83 Four Wings

  Increase dodge rate by 8%.
• Hanami Folding Fan

  2011 Hanami Festival - Usagi! Increase dodge rate and critical rate by 3%.
• Ninjas Stocking

  Increase 5% Combustion chance and attack damage by 3%.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• S69 Skull Cloak

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• Gunbai: Gyoji
• Dragon Crucifix Spear
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.