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 :

• White Guitar
• Shishimai Back

  Restores 3% of users max HP.Has 4% chance to convert damage taken to HP positively.
• Aboriginal Hunting Set

  Increase accuracy by 5% and Combustion chance 6%.
• Basic Jounin Battle Gear
• Native Horn

  Increase max. CP by 3%, Recover 1% HP with every Charge.
• Karasu Miya Falcon

  Increase dodge rate by 6%.
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• Radish Launcher

  It will fly you to the moon! (Easter 2011 Limited Edition)
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Ancient Pipe

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Smart Phone
• Blue Cloud Umbrella

  Ignore 6% targets dodge.
• Ferret Tail
• S24 Junsei Ring

  Increase max. HP by 5%.
• Sengoku Flag

  Increases damage by 4%. Each turn recover 120 HP.
• Sakura Lucky Bag

  Increase 3% damage, 4% chance to freeze attackers for 1 turn . Frozen target cannot move but damage taken is reduced by 80%
• Bronze Torch of Zeus

  Increase mission XP reward by 200
• Soul of Egg Hunting Beast

  2012 Egg Hunting Event
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• Gunbai: Gyoji
• Stuff Bunny

  Increase Max. HP by 2% and Max. CP by 4%.
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Frost Soul Electric Guitar
• Flag of the Burning Legion

  Reduce 3% damage taken and 12% chance to absorb 2% HP of enemy who attack you.
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• Chakra Magatama

  Increase 2% accuracy.
  Additional 5 HP damage upon all attack.
• 2011 Carnival Jiegu

  Ninja Saga 2nd Anniversary Carnival! Each turn recover 100 HP and 100 CP.