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 :

• Sack of Hearts

  Cupids sack of hearts. Recovers 3% HP every turn. Has 5% chance to convert any damage to HP.
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• Call of the Angel

  Reduce damage taken by 100. Has 6% chance to convert damage taken to HP positively.
• Paper Windmill

  Additional 20 HP damage upon all attack.
• Black Koi
• Karasu Miya Falcon

  Increase dodge rate by 6%.
• FIFA Whistle

  Recover 100 CP at the start of every turn and reduces damage taken by 80.
• Evil Way Lute

  Has a 50% chance to recover 5% of maximum HP. Has 10% chance to absorb 3% HP
• Writing Brush
• S1 Angelic Silverware

  Increase dodge rate by 5%. Reduce damage taken by 9%.
• Leos Recurve Bow

  Increases damage by 4% and dodge rate by 1%.
• Ronin Idol

  Reduce damage taken by 100 and restores 4% of users max HP.
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• Christmas Wreath

  Increase agility by 1 and Max HP by 1%.
• Scroll: Red Curse seal
• Blood Brush

  Increase 3% damage and increase healing power of scrolls by 10%.
• Ritual Taiko
• Cursed Devil

  Increase attack damage by 15%. But reduce max. HP and max. CP by 10%
• Wine Gourd
• S8 Sign of Corruption

  Wings with an ominous aura. Increases agility by 3.
• S74 Burning Wings

  Increases attack damage by 4% and Combustion chance by 25%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S72 Hero Twin Axe

  Increase 12% Combustion Chance and recover 3% HP at the start of every turn. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Trident
• Bell of Fortune

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

  Exclusive Halloween item - the devils sickle that has 10% chance to absorb 1% HP of enemy who attack you.
• Scroll: Kinjutsu I
• S1 Helianthus

  Restores HP & CP by 5%. Increase purify chance by 5%.