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 :

• Native Drum

  5% chance to convert damage taken to HP positively.
• S14 Ancient Yabusa Knife

  Increases attack damage 4% and ignore 3% of targets dodge.
• Chakra Ancestor Flame

  Reduce damage taken by 175. Has 5% chance to convert damage taken to HP positively.
• S83 Four Wings

  Increase dodge rate by 8%.
• Neptunes Healing

  Amazing power from Neptune. 3% chance to convert damage taken to HP positively and recover 3% HP at the start of every turn.
• Puppet: Spider
• Hanagara Dama

  Increase max. CP by 6%
• Dark Cry Raijinco
• Paper Envoy of God

  Increases attack damage and reduces damage received by 4%
• Paper Windmill

  Additional 20 HP damage upon all attack.
• Yolanda Rescue First Aid Kit
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• 4th Anniversary Back Item

  Ninja Saga 4th Anniversary edition! Recover 50 HP and 150 CP at the start of every turn.
• S24 Junsei Ring

  Increase max. HP by 5%.
• Mercy Of Libra

  Recover 2% HP at the start of every turn. And recover 3% HP with every Charge.
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• 2011 Carnival Jiegu

  Ninja Saga 2nd Anniversary Carnival! Each turn recover 100 HP and 100 CP.
• S32 Black Senbu

  Recover HP by 4% and reduces damage received by 3%.
• Basic Jounin Battle Gear
• S13 Ancient Kishu Twin Blades

  Increase accuracy by 6%
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• Sengoku Flag

  Increases damage by 4%. Each turn recover 120 HP.
• Ramen Shop Lantern
• Flour Stick
• S54 Ebony Nunchaku

  Increases damage by 7%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Three Ring Magatama

  Increase 2% accuracy.
  Additional 12 HP damage upon all attack.
• Emblem backpack (Yellow)

  Double mission XP reward in level 1 to level 20.