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 :

• Assault Kite

  Recover 100 HP and 80 CP at the start of every turn.
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• Osuzu Shinsen

  Ninja Saga 2nd Anniversary Carnival! Increase all attack damage by 5%.
• Sakura Gold Jewellery

  Increases users agility by 1. Restores 3% of users max HP. Has 6% chance to convert damage taken to HP positively.
• Clear Cross

  Increase 3% purify chance. Each turn recover 150 HP and 150 CP.
• GM Phone

  GM Phone
• Sakura Dance

  Increase damage by 3% and max. HP by 4%.
• Hanagara Hagoita

  Increase max. HP by 3%.
• Mini Octopus
• Blue Bird Wings
• Fighting spirit Taiko
• Writing Brush
• Patriot Aegis

  A mythical shield that can block even the most vicious attacks. Increases max HP by 3%. Has a 60% chance to recover 5% of maximum HP and reduces damage taken by 75.
• 2011 Fortune Lantern

  Ninja Saga 2nd Anniversary Carnival!
• Orange Kikyo Skis
• S16 Umbra Steel Wheel

  Reduce damage taken by 270.
• Magical Wreath

  Recover HP by 2% and reduce 4% damage taken.
• S15 Frozen Large Sword

  Increase 7% purify chance.
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• Python Scales Raijinco
• S39 Spike Hammer

  Increase accuracy by 10% but reduce max. HP by 10%.
• Scroll: Double Head
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Force of Taowu

  Increases Max. HP by 4% and Max. CP by 4%.
• Tai Chi Gold Gourd

  Restores HP by 4%. Increase healing power of scrolls by 500%. Reduce target 3% CP on every weapon attack.
• War Flag: World Peace
• Bell of Fortune

  6% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.