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 :

• Mirror of Shamisen
• Screw Pattern Skis
• Three Ring Magatama

  Increase 2% accuracy.
  Additional 12 HP damage upon all attack.
• Leopard Cat Tail
• S5 Possessed Koto

  Increase purify chance by 7%. Reduce jutsu CP consumption for 10%. Has 15% Chance to stun target when attack with weapon for 1 turn.
• S16 King Kong Ring

  Recover HP by 1% and reduces damage received by 4%.
• S8 Underworld Bulwark

  A phantom shield with demon soul. Reduce damage taken by 10%.
• Green Koi
• Frost Soul Electric Guitar
• Successor Fan

  Restores HP & CP by 2%. Has 7% chance to freeze enemy who attacks user (2 turn). Frozen target cannot move but damage taken is reduced by 80%.
• S74 Burning Wings

  Increases attack damage by 4% and Combustion chance by 25%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Great Wooden Hammer

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• 2011 Carnival Jiegu

  Ninja Saga 2nd Anniversary Carnival! Each turn recover 100 HP and 100 CP.
• Banana Back Item

  Banana Back Item
• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• S50 Blood Shade Magatama

  Created with blood and molten lava, the blood shade magatama consumes the life force of anyone with malicious intent. Has a 8% chance to absorb 10% of the attackers max HP and 8% chance to convert any damage taken to HP.
• Golden Torch of Zeus

  Recover 150 HP every turn
• Purple Dragon umbrella
• Soul of Egg Hunting Beast

  2012 Egg Hunting Event
• Scroll: Grassland
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• Hidden Green Umbrella
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• S56 Curse Brush

  A legendary Ink Brush that has the ability to materialize drawings. Increase critical rate by 5% and accuracy by 6%.
• Dual Blade of Fire

  Increase 3% damage made, recover self 2% HP each turn.