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 :

• Scroll: Kochin
• Bell of Beast

  Recover HP by 3%. 15% chance to absorb 3% HP of enemy who attack you.
• S3 Fossil of Magatama

  Increase purify chance by 6%. Has 10% chance to convert damage taken to HP positively.
• Sagittarius Hunting Set

  Increases dodge rate by 4%. Additional 80 HP damage on all attacks.
• Mini Scroll
• Stuff Bunny

  Increase Max. HP by 2% and Max. CP by 4%.
• Merlins Magical book

  Increases attack damage 5%
• Osuzu Shinsen

  Ninja Saga 2nd Anniversary Carnival! Increase all attack damage by 5%.
• S61 God Dragon Flag

  Increase critical rate by 6%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• S52 Gold Dragon Scroll

  Reduce damage taken by 7%. Ignore targets dodge rate by 5%.
• S5 The Guider

  Increase purify chance by 7%. Recover 8% HP when purify. Recovers 4% of the user's max HP.
• Fighting spirit Taiko
• Folding Fan: Shino
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S23 Meschiken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S2 Demons erosion

  Recovers 4% of the users max HP every turn. Additional 100 damage on all attacks.
• Hanami Dango

  Reduces damage received by 7%. Restore 85 HP every turn.
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.
• Carp Flag
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• Light Cry Raijinco
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• S55 Mirror of Fantasy

  Increases damage by 6% and accuracy by 5%. Has a 7% chance to convert any damage taken to HP.
• Scroll: Genbu
• Golden Torch of Zeus

  Recover 150 HP every turn
• Musashi Twin Blades
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.