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 :

• White Metal Hammer
• Drum: Ako
• Sakura Gold Jewellery

  Increases users agility by 1. Restores 3% of users max HP. Has 6% chance to convert damage taken to HP positively.
• Charming Aura (Pink)

  2012 Valentines day limited aura, reduce damage 2%.
• Puppet: Spider
• Dual Blade of Fire

  Increase 3% damage made, recover self 2% HP each turn.
• S21 Rokulin Gunbai

  Ignore enemys dodge rate by 8%.
• S2 Ancient Bone Claw

  An ancient bone that emanates great power. Increases accuracy by 8%. Recovers 100 HP every turn.
• S54 Ebony Nunchaku

  Increases damage by 7%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• S12 Ancient Blood Evil Gourd

  Increase max. HP by 5%. But reduce Max.CP by 1%.
• Shadow Twin Blades
• Osuzu Shinsen

  Ninja Saga 2nd Anniversary Carnival! Increase all attack damage by 5%.
• 2011 Carnival Jiegu

  Ninja Saga 2nd Anniversary Carnival! Each turn recover 100 HP and 100 CP.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• Bell of Beast

  Recover HP by 3%. 15% chance to absorb 3% HP of enemy who attack you.
• Cupid Wing

  Increase critical chance 4% and critical damage 10%.
• S17 Scorching Sun Lantern

  Recover 10% cp after dealing damage.
• Sand Gourd
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• Great Wooden Hammer (7 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every charge.
• Dark Evil Sickle

  Exclusive Halloween item - the devils sickle that has 10% chance to absorb 1% HP of enemy who attack you.
• Tail of Jyubi

  Forged with chakra of the legendary tailed beast, Jyubi. Increase attack damage by 15% but reduce max. CP by 30%.
• S75 Trifecta Swords

  It gives off a strange feeling of vigor. Restores CP by 3%. Increases max CP by 7%.
• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• Christmas Deer

  Increase critical chance 2% and critical damage 6%.
• S5 The Guider

  Increase purify chance by 7%. Recover 8% HP when purify. Recovers 4% of the user's max HP.