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 :

• Smart Phone
• Scroll: Double Head
• Heart Aura

  Hidden feelings emerges! Recovers 2% of the user's max HP and 100 HP every turn.
• Justice and Freedom

  Flag of the United States of America which symbolizes freedom and liberty. Recover 3% HP with every charge. Increases critical rate by 3%. Reduces damage taken by 50.
• Mini Octopus
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• S18 Evil Spirit Wings

  Increase 10% critical rate.
• Raccoon Tail
• GM Goldfish

  GM Goldfish
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• Ishiyama Lantern

  Reduce damage taken by 49.
• 2011 Carnival Jiegu

  Ninja Saga 2nd Anniversary Carnival! Each turn recover 100 HP and 100 CP.
• Light of Eternal

  Increase Max.HP 3%. Recover 3% SP at the start of every turn.
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Matsuyama Fan

  Ignore enemys dodge rate by 6%.
• Pirate Skull Flag

  Increase 6% purify chance. Reduce damage taken by 5%.
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• S4 Bladed Wings

  Reduce damage taken by 400. Recovers 1% of the user's max HP
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• Chakra Kanawa

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.
• Carp Flag
• Folding Fan: Shino
• 2011 Fortune Lantern

  Ninja Saga 2nd Anniversary Carnival!
• Black Metal Hammer
• Choco Tama

  Increase accuracy by 5% and increase healing power of scrolls by 25%.
• S16 Umbra Steel Wheel

  Reduce damage taken by 270.