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 :

• GM back item
• Nightmare Grudge

  Ignore 4% targets dodge.
• Christmas Deer

  Increase critical chance 2% and critical damage 6%.
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• 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%
• Brilliant Stock Pot

  Increase max. HP by 8% and purify chance by 2% but reduce max. CP by 8%.
• Decorative Rope
• Justice and Freedom

  Flag of the United States of America which symbolizes freedom and liberty. Recover 3% HP with every charge. Increases critical rate by 3%. Reduces damage taken by 50.
• Mimosa
• Shadow Twin Blades
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• S4 Bladed Wings

  Reduce damage taken by 400. Recovers 1% of the user's max HP
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Light Cry Raijinco
• Water Shark Skis
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Heart Aura

  Hidden feelings emerges! Recovers 2% of the user's max HP and 100 HP every turn.
• S81 Wheel of Glory

  Reduce damage taken by 200. Increase Combustion chance by 15%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Crystal Ice Mirror

  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%
• 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.
• Evil Way Lute

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

  Increase accuracy by 5% and increase healing power of scrolls by 25%.
• Native Drum

  5% chance to convert damage taken to HP positively.
• S76 Buckler and Sword

  Increase max.HP by 12% but reduce max. CP by 2%.
• Large Wooden Hammer
• Trident
• Sakura Lantern

  Increase Combustion chance by 10%.(Minimum requirement of 1 Attribute Point in Fire to activate combustion effect). Has 10% chance to absorb 2% HP of enemy who attack you.