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 :

• Wooden Hammer
• Soul of Egg Hunting Beast

  2012 Egg Hunting Event
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• Mother's Hug (II)

  Recover 150 HP and 3% HP at the start of every turn.
• Businessman Luggage
• Chakra Message Stick
• Hanami Dango

  Reduces damage received by 7%. Restore 85 HP every turn.
• Merlins Magical book

  Increases attack damage 5%
• Fire Symbol Guitar
• Scroll: Genbu
• 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.
• Blue Wolf Tail
• Hidden Green Umbrella
• GM Goldfish

  GM Goldfish
• Gunbai: World Peace
• S24 Junsei Ring

  Increase max. HP by 5%.
• Mirror of Thousand Hands
• Straw Hat

  Increase dodge rate by 3%.
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Toxic Spider Web

  10% chance to apply Restriction on enemies who attacks the user for 1 turn.
  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%
• Sakura wah

  Restores HP by 3% and CP by 99 each turn.
• Chromaflake

  Increases damage by 5% and dodge rate by 3%.
• Togatsuki Paper Fan

  Increase max. CP by 10%.
• Great Stinger

  Reduces damage taken by 3%. Converts 9% of damage taken into CP.
• S44 Earth Caller

  Increases attack damage by 4% and max HP by 5%.
• Fairy Wings

  Fairy wings that owned by a fairy
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.