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 :

• Water Energy Skis
• Ukon Three Blades
• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• Christmas Bag

  Reduce damage taken by 10.
• Tail of Hachibi

  Forged with chakra of the legendary tailed beast, Hachibi. Increase critical chance by 15% but reduce max. HP by 20%.
• Evil Way Lute

  Has a 50% chance to recover 5% of maximum HP. Has 10% chance to absorb 3% HP
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.
• Hanami Fan

  Ignore 4% targets dodge and increase max. HP by 2%.
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.
• Roasted Turkey

  Restore 20 HP every turn.
• Dark World Hammer
• Shoguns Badge Gourd

  Increase Max. HP & CP by 3%
• S38 Genrei Fan

  Increase max.CP by 50% but reduce max. HP by 20%.
• S18 Evil Spirit Wings

  Increase 10% critical rate.
• Smart Phone
• Hanagara Hagoita

  Increase max. HP by 3%.
• Sakura Lantern

  Increase Combustion chance by 10%.(Minimum requirement of 1 Attribute Point in Fire to activate combustion effect). Has 10% chance to absorb 2% HP of enemy who attack you.
• Universal Backpack

  Increase healing power of scrolls by 100%. Each turn recover 140 HP.
• Folding Fan: Shino
• S69 Skull Cloak

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• Successor Fan

  Restores HP & CP by 2%. Has 7% chance to freeze enemy who attacks user (2 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Bear of Affection

  Increase dodge rate by 3% and ignore target dodge by 3%.
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• Charmed Heart

  Theres no escaping love. Increases accuracy by 5%. Adds 40 damage in all of your attacks.
• Sealing Pot

  Increases Max. HP by 4% and recover 3% HP at the start of every turn.