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 :

• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Frost Soul Electric Guitar
• Tail of Jyubi

  Forged with chakra of the legendary tailed beast, Jyubi. Increase attack damage by 15% but reduce max. CP by 30%.
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• S31 Yabusa Dual Head Spear

  Increase 4% damage and 4% critical rate.
• Christmas Wreath

  Increase agility by 1 and Max HP by 1%.
• Clouds And Mist Raijinco
• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every charge.
• Colorful Moai Egg

  Reduce damage taken by 100 and recover 10% extra CP when charge.
• War Flag: World Peace
• Dark Secret Seal

  Increases critical chance by 4%. Has 12% chance to Restrict anyone who attacks the user.
• Paper Envoy of God

  Increases attack damage and reduces damage received by 4%
• Wind Storm Raijinco
• Light Cry Raijinco
• Grand Light Gourd

  Increase 3% damage
• S8 Ancient Scroll of Golden Snake

  Increase all attack damage by 4%, and Decrease damage taken by 4%. But reduce critical chance by 1%.
• Spirit Flag

  An inspiring banner that boosts the holders morale. Increase critical chance and dodge rate by 3%.
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.
• Folding Fan: Shino
• S5 Possessed Koto

  Increase purify chance by 7%. Reduce jutsu CP consumption for 10%. Has 15% Chance to stun target when attack with weapon for 1 turn.
• Ice Cystal Raijinco
• 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)
• S2 Ancient Bone Claw

  An ancient bone that emanates great power. Increases accuracy by 8%. Recovers 100 HP every turn.
• Cerberus's Flame

  80% chance to burn enemy who attack user - Reduce 3% HP for 2 turns.
• Scroll: Genbu
• Merlins Magical book

  Increases attack damage 5%