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 :

• Large Wooden Hammer
• Victorious Crown

  Increases accuracy by 4% and recover HP by 3%. Has 13% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Mousetrap

  15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Ocean Ring

  Increase 1% accuracy.
  Additional 2 HP damage upon all attack.
• Sealed Wood

  A back item which lost the original effectiveness.
• Love Ribbon

  Additional 40 HP damage upon all attack.
• S5 The Guider

  Increase purify chance by 7%. Recover 8% HP when purify. Recovers 4% of the user's max HP.
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• Thanksgiving Balloons

  Increase max. HP by 2%.
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Smoothbore Musket

  Increase 10% damage.
  Reduce 3% damage taken.
• S3 Fossil of Magatama

  Increase purify chance by 6%. Has 10% chance to convert damage taken to HP positively.
• Chakra Ancestor Flame

  Reduce damage taken by 175. Has 5% chance to convert damage taken to HP positively.
• Sakura Gold Jewellery

  Increases users agility by 1. Restores 3% of users max HP. Has 6% chance to convert damage taken to HP positively.
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• S8 Scroll of Golden Snake

  Increase all attack damage by 4%. Decrease damage taken by 4%.
• Scroll: Grassland
• Scroll: Genbu
• Colorful Moai Egg

  Reduce damage taken by 100 and recover 10% extra CP when charge.
• Straw Hat

  Increase dodge rate by 3%.
• Drum of Euphoria

  Recover 3% HP at the start of every turn, and recover 3% HP with every Charge.
• 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.
• S29 Yanki Protective Magatama

  Increase accuracy by 8%
• Father's Heart (II)

  Reduce damage taken by 7%. Reduce damage taken by 150.
• Raijin Raijinco
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Light of Eternal

  Increase Max.HP 3%. Recover 3% SP at the start of every turn.