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 :

• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• S59 Rejuvenating Blade Wings

  Increases Max. HP by 6% and Max. CP by 4%.
• S68 Supreme Faerie Wings

  Recover 20% extra CP when charge. Has 10% chance to convert damage taken to HP positively.
• 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.
• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.
• Cornucopia

  Increase healing power of scrolls by 100%. Has 6% chance to convert damage taken to HP positively.
• Sand Gourd
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• Three Ring Magatama

  Increase 2% accuracy.
  Additional 12 HP damage upon all attack.
• Three-stringed Lute Guitar
• Bell of Fortune

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

  Recover 15% extra CP when charge.
• White Guitar
• Umiyuki Painted Wood

  Reduce 24 HP damage taken.
• Carnival Fan

  Dance with the Fan during Ninja Saga Anniversary Carnival! Increase all attack damage by 3%.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• Evil Way Lute

  Has a 50% chance to recover 5% of maximum HP. Has 10% chance to absorb 3% HP
• Charmed Heart

  Theres no escaping love. Increases accuracy by 5%. Adds 40 damage in all of your attacks.
• GM Phone

  GM Phone
• Puppet: Spider
• Osuzu Shinsen

  Ninja Saga 2nd Anniversary Carnival! Increase all attack damage by 5%.
• Blue Shell
• Angel Heart (White)

  16% chance to absorb 2% HP of enemy who attack you.
• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• Ancient Pipe

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Flag: Dragon Symbol
• Hide Guitar