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 :

• Father's Heart

  Reduce damage taken by 6%.
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• 4th Anniversary Back Item

  Ninja Saga 4th Anniversary edition! Recover 50 HP and 150 CP at the start of every turn.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• Clouds And Mist Raijinco
• Firefox Tail
• Gruidae Wing

  Each turn recover 80 CP. Recover CP after HP reduction. (Amount: 8% of HP reduction)
• Carp Flag
• S69 Skull Cloak

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• Businessman Luggage
• Ritual Taiko
• S28 Orochi Statue

  Increase attack damage by 4%, and recover HP by 1%.
• Ninjas Stocking

  Increase 5% Combustion chance and attack damage by 3%.
• Red Shell
• Spiked Blade

  Increases dodge and critical chance by 4%. Recovers 70 HP each turn.
• Hanagara Hagoita

  Increase max. HP by 3%.
• Scroll: Kochin
• Egg Hunter Basket

  Increase 6% accuracy. (Easter 2011 Limited Edition)
• Paper Envoy of God

  Increases attack damage and reduces damage received by 4%
• Christmas Deer

  Increase critical chance 2% and critical damage 6%.
• Umiyuki Painted Wood

  Reduce 24 HP damage taken.
• Radish Launcher

  It will fly you to the moon! (Easter 2011 Limited Edition)
• Ocean Ring

  Increase 1% accuracy.
  Additional 2 HP damage upon all attack.
• Angel Wings

  Increase 3% attack damage and ignore 3% targets dodge.
• Gummy Bear

  Restores CP by 2%. Reduce damage taken by 100.
• Skull Twins

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

  Increase dodge rate by 3% and ignore target dodge by 3%.