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 :

• Toxic Village Poison Potion
• S29 Yanki Protective Magatama

  Increase accuracy by 8%
• Puppet: Hakuki

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

  Increases users agility by 1. Recover 150 HP at the start of every turn.
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.
• S23 Meschiken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Champion Cup!

  Ultimate prize for Champions.
• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• S14 Profound Tentacles

  35% 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.
• Fighting spirit Taiko
• Four-Point Shuriken
• Colorful Snowflake

  Increase agility by 1. Has 15% chance to freeze enemy who attacks user (2 turns). Frozen target cannot move but damage taken is reduced by 80%.
• Charmed Heart

  Theres no escaping love. Increases accuracy by 5%. Adds 40 damage in all of your attacks.
• Mercy Of Libra

  Recover 2% HP at the start of every turn. And recover 3% HP with every Charge.
• Beast Mace
• Scroll: Kinjutsu I
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• Blue Shell
• Ronin Idol

  Reduce damage taken by 100 and restores 4% of users max HP.
• Native Drum

  5% chance to convert damage taken to HP positively.
• Red Shell
• Large Wooden Hammer
• Nightmare Grudge

  Ignore 4% targets dodge.
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Trident