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 :

• Musashi Twin Blades
• Water Shark Skis
• Ultimate Taiko

  Recover 120 HP at the start of every turn. Has 15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Aboriginal Hunting Set

  Increase accuracy by 5% and Combustion chance 6%.
• Black Koi
• S46 Holy Drum

  Reduce damage taken by 4%. Increase chance to restrict enemy for 1 turn by 20%. Targets with “Restriction” will not be able to use any skills.
• S9 Warring Empire Bulwark

  A strong and sturdy shield. Reduces damage taken by 35% but reduces the user's agility by 15.
• GM back item
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• Wind Storm Raijinco
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• Champion Cup!

  Ultimate prize for Champions.
• Charming Aura (Red)

  2012 Valentines day limited aura, increase all damage 2%.
• S8 Sign of Corruption

  Wings with an ominous aura. Increases agility by 3.
• Dark Secret Seal

  Increases critical chance by 4%. Has 12% chance to Restrict anyone who attacks the user.
• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Sakura wah

  Restores HP by 3% and CP by 99 each turn.
• Blizzard

  Increases users agility by 1. Has 7% chance to convert damage taken into HP.
• Blue Bird Wings
• S21 Rokulin Gunbai

  Ignore enemys dodge rate by 8%.
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• Scroll: Messenger

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• S65 Transcendent Flame Wings

  Remnants of a powerful fire spirit. Increases attack damage by 7% and increase 20% Combustion chance. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Lovely Santa Bag

  A bag that resembles Santa Claus, it emanates faint revitalizing aura. Restores 140 HP and 30 CP at the start of every turn.
• Chromaflake

  Increases damage by 5% and dodge rate by 3%.
• Straw Hat

  Increase dodge rate by 3%.
• Evil Way Lute

  Has a 50% chance to recover 5% of maximum HP. Has 10% chance to absorb 3% HP