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 :

• Ferret Tail
• Umiyuki Painted Wood

  Reduce 24 HP damage taken.
• Blue Pattern Skis
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• Hidden Green Umbrella
• Turkey Balloon

  Reduce damage taken by 7%. Recover 10% extra CP when charge.
• Shadow Umbrella
• S67 Omni Cloud

  Increase accuracy by 6% and dodge rate by 5%.
• War Flag: Syoshin

  Increase mission XP reward by 100.
• Super Rabbit Doll

  Increase damage by 9%.
• Love Ribbon

  Additional 40 HP damage upon all attack.
• Scroll: Kinjutsu I
• Dark Plate Twin Blades
• Cancer Assegai

  Increases critical rate by 4%. Reduce damage taken by 3%.
• Puppet: Hakuki (7 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• Luckey windmill

  Each turn recover 120 HP and 120 CP.
• Black Silver Electric Guitar
• Swire Raijinco
• Ichimoku Gourd
• Christmas Bag

  Reduce damage taken by 10.
• Death Wooden Coffin
• Star Dawn Harp

  Increases users agility by 1. Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover HP by 2% when being put on a debuff.
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• Enternal Love Scroll

  Increase 5% Combustion chance and reduce 1% damage taken.
• New Year Kadomatsu

  Recover 100 HP and 100 CP at the start of every turn.
• Scroll: Grassland
• Flag of the Burning Legion

  Reduce 3% damage taken and 12% chance to absorb 2% HP of enemy who attack you.