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 :

• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Thorn hammer
• Christmas Chimney

  4% chance to freeze enemy who attacks user (1 turn). Frozen target cannot move but damage taken is reduced by 80%.
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• Curved Spear
• Shinobi Curse Battle Umbrella
• Triple Taiko

  Increases Max. HP by 4% and healing power of scrolls by 100%.
• S24 Junsei Ring

  Increase max. HP by 5%.
• Puppet: Hakuki (7 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• Snowflake

  3% chance to freeze enemy who attack user (1 turn). (Frozen target cannot move but damage taken is reduced by 80%.)
• Mini Evil Wing

  Exclusive Halloween item - the devils wings that frighten enemy, and hence reduce their damage done on you by 5%.
• Leopard Cat Tail
• Apple Candy

  Increases damage by 5%. Has 3% chance to convert damage taken to HP positively.
• Carrot Launcher

  Increase agility by 1. (Easter 2011 Limited Edition)
• Father's Heart

  Reduce damage taken by 6%.
• Fighting spirit Taiko
• Apricot Pipa
• Straw Hat

  Increase dodge rate by 3%.
• S70 Magical Cobweb

  Restores CP by 3%. 30% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Mini Goldfish
• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every charge.
• S8 Sign of Corruption

  Wings with an ominous aura. Increases agility by 3.
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• Blue Bird Wings
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Blood Brush

  Increase 3% damage and increase healing power of scrolls by 10%.
• Colorful Moai Egg

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