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 :

• Scroll: Tenku
• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• Trident
• Paper Envoy of God

  Increases attack damage and reduces damage received by 4%
• Scroll: Posion Attack
• Scroll: Kochin
• Blue Crystal Wings

  Recover 15% extra CP when charge.
• Virgos Eternal Wings

  Increases agility by 1. Increases users attack damage by 3%.
• Scroll: Fire and Earth
• Togatsuki Paper Fan

  Increase max. CP by 10%.
• Ferret Tail
• Green Koi
• Matsuyama Fan

  Ignore enemys dodge rate by 6%.
• Hanagara Hagoita

  Increase max. HP by 3%.
• S16 King Kong Ring

  Recover HP by 1% and reduces damage received by 4%.
• Master Scroll

  Restores HP & CP by 3%.
• Black Metal Hammer
• Super Rabbit Doll

  Increase damage by 9%.
• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every charge.
• Mother's Hug

  Recover 100 HP and 2% HP at the start of every turn.
• Soul of Egg Hunting Beast

  2012 Egg Hunting Event
• Clouds And Mist Raijinco
• Christmas Treasure Bag

  Increase agility by 1.
• FIFA Whistle

  Recover 100 CP at the start of every turn and reduces damage taken by 80.
• Gemini Halo Glyph

  Increases damage by 4%. Reduce damage taken by 65.
• Angel Wings

  Increase 3% attack damage and ignore 3% targets dodge.
• Swire Raijinco