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 :

• Beast Mace
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• 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.
• Universal Backpack

  Increase healing power of scrolls by 100%. Each turn recover 140 HP.
• Master Scroll

  Restores HP & CP by 3%.
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• Black Double Gun

  Ignore enemys dodge rate by 3%. Increase accuracy by 3%.
• Gunbai: Gyoji
• First-Aid Kit

  100% of the purchase price will be donated to Japan earthquake relief.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• Heian-kyo Shamisen
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Basic Jounin Battle Gear
• Universal Saber

  Increases users agility by 1. Recover 150 HP at the start of every turn.
• White Metal Hammer
• Bear of Affection

  Increase dodge rate by 3% and ignore target dodge by 3%.
• War Flag: Syoshin

  Increase mission XP reward by 100.
• Dark Secret Seal

  Increases critical chance by 4%. Has 12% chance to Restrict anyone who attacks the user.
• Scroll and Blade

  Has 11% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills. Increase critical rate by 5%. 8% chances of using Jutsu without CP.
• S9 Warring Empire Bulwark

  A strong and sturdy shield. Reduces damage taken by 35% but reduces the user's agility by 15.
• Angel Heart (White)

  16% chance to absorb 2% HP of enemy who attack you.
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• Shadow Twin Blades
• Yolanda Rescue First Aid Kit
• Christmas Wreath

  Increase agility by 1 and Max HP by 1%.
• Puppet: Hakuki (7 Days)

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