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 :

• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• Wooden Hammer
• Big Cask

  Increase max.HP by 15% but reduce max. CP by 5%.
• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• S20 Empire Battle Gear

  6% chance to convert damage taken to HP positively.
• Dark Secret Seal

  Increases critical chance by 4%. Has 12% chance to Restrict anyone who attacks the user.
• Scroll: Yinyang Seal
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Folding Paper Fan
• Toxic Spider Web

  10% chance to apply Restriction on enemies who attacks the user for 1 turn.
  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%
• Purple Mixing Yellow Umbrella
• Wind Storm Raijinco
• Mother's Hug

  Recover 100 HP and 2% HP at the start of every turn.
• Sand Gourd
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Peom Fan

  Reduce 46 HP damage taken.
• 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.
• Zombie Hand

  Increase attack damage by 15%. But each turn reduce 200 HP and 300 CP.
• Flame Blade Raijinco
• Magical Wreath

  Recover HP by 2% and reduce 4% damage taken.
• Charmed Heart

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

  Increase max. HP by 8% and purify chance by 2% but reduce max. CP by 8%.
• Dark Cry Raijinco
• S23 Meschiken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Red Shuriken Skis
• S8 Underworld Bulwark

  A phantom shield with demon soul. Reduce damage taken by 10%.
• Golden Torch of Zeus

  Recover 150 HP every turn