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 :

• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• Cornucopia

  Increase healing power of scrolls by 100%. Has 6% chance to convert damage taken to HP positively.
• Ferret Tail
• Fairy Wings

  Fairy wings that owned by a fairy
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• S44 Earth Caller

  Increases attack damage by 4% and max HP by 5%.
• Blue Cloud Umbrella

  Ignore 6% targets dodge.
• Businessman Luggage
• S28 Orochi Statue

  Increase attack damage by 4%, and recover HP by 1%.
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• Iron Tortoise Shell

  Reduce damage taken by 200.
• Aries Taiko

  A magical taiko used in celebrations during the Aries zodiac months. Recovers 50 HP every turn and reduces damage taken by 25.
• FIFA Whistle

  Recover 100 CP at the start of every turn and reduces damage taken by 80.
• 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.
• War Flag: Furinkazan
• Sealing the soul barrel
• Large Wooden Hammer
• Four-Point Shuriken
• Charming Aura (Black)

  2012 Valentines day limited aura, increase critical chance 2%.
• Spartan Shield

  Restore 100 HP every turn. Reduce damage taken by 5%.
• S51 Enchanted Winged Carapace

  Increases accuracy by 3%. Recover 4% HP at the start of every turn.
• Bear of Affection

  Increase dodge rate by 3% and ignore target dodge by 3%.
• S24 Junsei Ring

  Increase max. HP by 5%.
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• Death Wooden Coffin