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 :

• Santa Gift Bag

  Reduce damage taken by 30.
• Carp Flag
• Apricot Pipa
• Father's Heart

  Reduce damage taken by 6%.
• S63 Stormbringer

  Increases dodge rate by 5%. Has 50% chance to absorb 2% HP of enemy who attack you.
• Shoguns Badge Gourd

  Increase Max. HP & CP by 3%
• Ramen Shop Lantern
• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• Angel Heart (White)

  16% chance to absorb 2% HP of enemy who attack you.
• Angel Heart (Black)

  Reduce target 8% CP on every weapon attack.
• Deadwood Pipa
• Puppet: Spider
• S15 Frozen Large Sword

  Increase 7% purify chance.
• S9 Warring Empire Guarding Bow

  An ancient enchanted bow with great range used in warfare. Increases accuracy by 10%. Restore 100 HP every turn.
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Tail of Jyubi

  Forged with chakra of the legendary tailed beast, Jyubi. Increase attack damage by 15% but reduce max. CP by 30%.
• Fighting spirit Taiko
• Tai Chi Gold Gourd

  Restores HP by 4%. Increase healing power of scrolls by 500%. Reduce target 3% CP on every weapon attack.
• Mother's Hug

  Recover 100 HP and 2% HP at the start of every turn.
• Prestige Purple Dragon

  Increase attack damage by 5%. Recover 100 HP at the start of every turn.
• Purple Dragon umbrella
• Turkey Balloon

  Reduce damage taken by 7%. Recover 10% extra CP when charge.
• Blood Brush

  Increase 3% damage and increase healing power of scrolls by 10%.
• Black Silver Electric Guitar
• Super Rabbit Doll

  Increase damage by 9%.
• Mini Goldfish
• S52 Gold Dragon Scroll

  Reduce damage taken by 7%. Ignore targets dodge rate by 5%.