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 :

• Yolanda Rescue First Aid Kit
• Hanami Taiko

  2011 Hanami Festival - Rhythm! Recover HP & CP by 10 every turn.
• Civet Cat Tail
• Pirate Skull Flag

  Increase 6% purify chance. Reduce damage taken by 5%.
• Blessed Kitty

  Bless on his master everyday, which increase 3% damage. Heal 1% HP in every turn.
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Shishimai Back

  Restores 3% of users max HP.Has 4% chance to convert damage taken to HP positively.
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• S34 Wooden Name Tag

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S38 Genrei Fan

  Increase max.CP by 50% but reduce max. HP by 20%.
• Bell of Fortune

  6% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Sagittarius Hunting Set

  Increases dodge rate by 4%. Additional 80 HP damage on all attacks.
• Hanami Lantern

  2011 Hanami Festival - Shine! Reduce damage taken by 15.
• Skull Twins

  7% chance to convert damage taken to HP positively and 20% chance to absorb 1% HP of enemy who attack you.
• Wooden Hammer
• Toxic Village Poison Potion
• S2 Ancient Bone Claw

  An ancient bone that emanates great power. Increases accuracy by 8%. Recovers 100 HP every turn.
• Chakra Magatama

  Increase 2% accuracy.
  Additional 5 HP damage upon all attack.
• Colorful Moai Egg

  Reduce damage taken by 100 and recover 10% extra CP when charge.
• Curved Spear
• Dark Blade

  Increase 2% critical rate and ignore 2% of targets dodge.
• Turkey Tail
• S55 Mirror of Fantasy

  Increases damage by 6% and accuracy by 5%. Has a 7% chance to convert any damage taken to HP.
• Blue Wolf Tail
• Shadow Twin Blades
• Taurus Wand

  A necromantic wand with a figurehead of a bull. Used by necromancers in ancient times to amplify their power. Recover 100 HP at the start of every turn. Has a 12% chance to absorb 3% HP of enemies who attack you.