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 :

• Shadow Umbrella
• Colorful Moai Egg

  Reduce damage taken by 100 and recover 10% extra CP when charge.
• Writing Brush
• Soul of Egg Hunting Beast

  2012 Egg Hunting Event
• Lovely Santa Bag

  A bag that resembles Santa Claus, it emanates faint revitalizing aura. Restores 140 HP and 30 CP at the start of every turn.
• S11 Wood Spirit's Shield

  Increase max. HP by 9% and 20% chance to absorb 3% HP of enemy who attack you.
• War Flag: Furinkazan
• S14 Profound Tentacles

  35% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Mini Octopus
• S53 Frostfire Soul

  Increases combustion chance by 15%. Has a 10% chance to freeze enemies who attacks the user for 1 turn. Frozen targets cannot act but takes 80% reduced damage.
• Scroll: Guren
• Thanksgiving Balloons

  Increase max. HP by 2%.
• Curved Spear
• Sakura wah

  Restores HP by 3% and CP by 99 each turn.
• Village Red Lantern
• S19 Magatama Soul Barrel

  Increase 4% critical rate and ignore 4% targets dodge.
• Raccoon Tail
• S28 Orochi Statue

  Increase attack damage by 4%, and recover HP by 1%.
• Christmas Deer

  Increase critical chance 2% and critical damage 6%.
• Blue Shell
• Clouds And Mist Raijinco
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• Kettle
• Love of coffee

  Prepared with love and empathy. Recovers 100 HP every turn. Increases attack damage by 4%.
• Yolanda Rescue First Aid Kit
• Spiked Blade

  Increases dodge and critical chance by 4%. Recovers 70 HP each turn.
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.