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 :

• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• Jingle Bell

  Reduce 2% damage taken. Recover 3% HP at the start of every turn.
• Scroll: Red Curse seal
• Charmed Heart

  Theres no escaping love. Increases accuracy by 5%. Adds 40 damage in all of your attacks.
• Tail Hunter Back Item

  Increase max. HP by 3%.
• Decorative Rope
• MegaJingleBell

  A glorious Christmas artifact which can be used in battle. Ignores 5% of enemys dodge rate. Recovers 2% of users max HP every turn.
• Mother's Hug

  Recover 100 HP and 2% HP at the start of every turn.
• Musashi Twin Blades
• Swordfish
• Wood Top
• Crimson Lanterns

  Increase attack damage by 6%. Has 6% chance to convert damage taken to HP positively.
• Scroll: Rikugo
• Magical Wreath

  Recover HP by 2% and reduce 4% damage taken.
• Mischievous Candy

  Increase accuracy by 3%. Increase healing power of scrolls by 50%.
• Christmas Wreath

  Increase agility by 1 and Max HP by 1%.
• Karasu Miya Falcon

  Increase dodge rate by 6%.
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Twins Sakura

  Ignore 5% targets dodge.
• Spiked Blade

  Increases dodge and critical chance by 4%. Recovers 70 HP each turn.
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• Virgos Eternal Wings

  Increases agility by 1. Increases users attack damage by 3%.
• S17 Scorching Sun Lantern

  Recover 10% cp after dealing damage.
• Swire Raijinco
• Sakura Straw Hat

  Recovers 2% of users max HP every turn.