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 :

• Charming Aura (Black)

  2012 Valentines day limited aura, increase critical chance 2%.
• Firefox Tail
• Scroll: Yinyang Seal
• Red Ukiyo-e Kite

  4% chance to convert damage taken to HP positively and increase max. HP by 2%.
• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Shadow Twin Blades
• GM back item
• Enternal Love Scroll

  Increase 5% Combustion chance and reduce 1% damage taken.
• S42 Tendo Tips

  Increases attack damage and reduces damage received by 5%.
• Turkey Balloon

  Reduce damage taken by 7%. Recover 10% extra CP when charge.
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• Ghost Spider

  Reduce 72 HP damage taken.
• S40 Gozen Breeze Back Item

  Recover 7% HP with every Charge.
• Scroll: Sun of Campaign
• Santa Gift Bag

  Reduce damage taken by 30.
• S7 Gorgeous Butterfly

  Increase agility by 2. Recover 20% extra CP when charge.
• Apricot Pipa
• Evil Way Lute

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

  Additional 40 HP damage upon all attack.
• Scroll and Blade

  Has 11% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills. Increase critical rate by 5%. 8% chances of using Jutsu without CP.
• Writing Brush
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• Decorative Rope
• Sakura Lucky Bag

  Increase 3% damage, 4% chance to freeze attackers for 1 turn . Frozen target cannot move but damage taken is reduced by 80%
• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.
• S55 Mirror of Fantasy

  Increases damage by 6% and accuracy by 5%. Has a 7% chance to convert any damage taken to HP.
• Dragon Crucifix Spear