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 :

• Master Scroll

  Restores HP & CP by 3%.
• Deadwood Pipa
• Red Shell
• Raijin Raijinco
• Scroll: Yinyang Seal
• Victorious Crown

  Increases accuracy by 4% and recover HP by 3%. Has 13% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Red Ukiyo-e Kite

  4% chance to convert damage taken to HP positively and increase max. HP by 2%.
• Blue Wolf Tail
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• Yatai Lantern
• Harvest Treasure Bag

  Reduce damage taken by 140. Recover 5% extra CP when charge.
• Big Cask

  Increase max.HP by 15% but reduce max. CP by 5%.
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Mischievous Candy

  Increase accuracy by 3%. Increase healing power of scrolls by 50%.
• Dragon Crucifix Spear
• Purple Dragon umbrella
• Togatsuki Paper Fan

  Increase max. CP by 10%.
• Celestial Wood Raijinco
• Cerberus's Flame

  80% chance to burn enemy who attack user - Reduce 3% HP for 2 turns.
• New Year Kadomatsu

  Recover 100 HP and 100 CP at the start of every turn.
• Great Wooden Hammer (7 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Tail of Kyubi

  Forged with chakra of the legendary tailed beast, Kyubi. 100% immune to Burn effect and increase 3% Combustion chance.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• Drum: Ako
• Ice Cystal Raijinco
• S3 Energetical Can

  Increase attack damage by 10% and Combustion chance by 18%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)