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 :

• Drum of Euphoria

  Recover 3% HP at the start of every turn, and recover 3% HP with every Charge.
• Christmas Trumpet

  Ignore enemys dodge rate by 4% and recover 3% CP with every charge.
• Orange Koi
• Gruidae Wing

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

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• S32 Black Senbu

  Recover HP by 4% and reduces damage received by 3%.
• Native Drum

  5% chance to convert damage taken to HP positively.
• Mech of Wing

  Reduce damage taken by 10%.
• Gemini Halo Glyph

  Increases damage by 4%. Reduce damage taken by 65.
• Blue Crystal Wings

  Recover 15% extra CP when charge.
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• S16 Umbra Fire Wheel

  Additional 170 HP damage upon all attack.
• War Flag: Furinkazan
• Hanami Lantern

  2011 Hanami Festival - Shine! Reduce damage taken by 15.
• Leopard Cat Tail
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• Smoothbore Musket

  Increase 10% damage.
  Reduce 3% damage taken.
• Gunbai: World Peace
• S10 Frostguard's Shield

  Shield of the valiant warrior Tundra. Increase agility by 2. Has 17% Chance to stun target when attack with weapon for 1 turn.
• Spinning Wheel

  Recover user's max HP by 1% each turn. Increases user's max CP by 2%. Converts 10% of damage taken into CP.
• Love Missile

  Additional 60 HP damage upon all attack.
• Firefox Tail
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.
• Water Energy Skis
• S14 Ancient Yabusa Knife

  Increases attack damage 4% and ignore 3% of targets dodge.