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 :

• Scroll: Messenger (7 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Sengoku Flag

  Increases damage by 4%. Each turn recover 120 HP.
• Cursed Devil

  Increase attack damage by 15%. But reduce max. HP and max. CP by 10%
• Crimson Lanterns

  Increase attack damage by 6%. Has 6% chance to convert damage taken to HP positively.
• Chromaflake

  Increases damage by 5% and dodge rate by 3%.
• Carrot Time Bomb

  Has 8% chance to freeze enemy who attacks user (1 turn). Frozen target cannot move but damage taken is reduced by 80%. Has 5% chance to convert damage taken to HP positively.
• S17 Scorching Sun Lantern

  Recover 10% cp after dealing damage.
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• Blue Bird Wings
• Sakura Gold Jewellery

  Increases users agility by 1. Restores 3% of users max HP. Has 6% chance to convert damage taken to HP positively.
• Huginn & Muninn

  Reduce 4% damage taken. Has 10% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Blizzard

  Increases users agility by 1. Has 7% chance to convert damage taken into HP.
• Orange Koi
• Knot of Avenger

  20% chance to absorb 2% HP of enemy who attack you. 20% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Virgos Eternal Wings

  Increases agility by 1. Increases users attack damage by 3%.
• War Flag: Syoshin

  Increase mission XP reward by 100.
• Vampire Cloak

  Increase healing power of scrolls by 100.
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• MegaJingleBell

  A glorious Christmas artifact which can be used in battle. Ignores 5% of enemys dodge rate. Recovers 2% of users max HP every turn.
• Love Missile

  Additional 60 HP damage upon all attack.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• Three-stringed Lute Guitar
• Spinning Wheel

  Recover user's max HP by 1% each turn. Increases user's max CP by 2%. Converts 10% of damage taken into CP.
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• Cancer Assegai

  Increases critical rate by 4%. Reduce damage taken 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.