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 :

• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• S8 Sign of Corruption

  Wings with an ominous aura. Increases agility by 3.
• First-Aid Kit

  100% of the purchase price will be donated to Japan earthquake relief.
• S21 Rokulin Gunbai

  Ignore enemys dodge rate by 8%.
• S74 Burning Wings

  Increases attack damage by 4% and Combustion chance by 25%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S53 Frostfire Soul

  Increases combustion chance by 15%. Has a 10% chance to freeze enemies who attacks the user for 1 turn. Frozen targets cannot act but takes 80% reduced damage.
• Mini Octopus
• Scroll: Double Head
• War Flag: Syoshin

  Increase mission XP reward by 100.
• Cancer Assegai

  Increases critical rate by 4%. Reduce damage taken by 3%.
• Mother's Hug

  Recover 100 HP and 2% HP at the start of every turn.
• Orange Koi
• S24 Junsei Ring

  Increase max. HP by 5%.
• S15 Ancient Seitenken

  Recover CP after HP reduction. (Amount: 16% of HP reduction)
• Scroll: Taiin
• Triple Taiko

  Increases Max. HP by 4% and healing power of scrolls by 100%.
• Extra Large Presents Bag

  A large present bag, but nobody knows what it contains.
• Swire Raijinco
• Swordfish
• S32 Black Senbu

  Recover HP by 4% and reduces damage received by 3%.
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Ritual Taiko
• 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.
• S75 Trifecta Swords

  It gives off a strange feeling of vigor. Restores CP by 3%. Increases max CP by 7%.
• Santa Gift Bag

  Reduce damage taken by 30.
• Curved Spear
• Beast Mace