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 :

• Sakura Straw Hat

  Recovers 2% of users max HP every turn.
• Steel Frame Tail
• S32 Black Senbu

  Recover HP by 4% and reduces damage received by 3%.
• Ancient Pipe

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Angel Wings

  Increase 3% attack damage and ignore 3% targets dodge.
• Water Energy Skis
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Yolanda Rescue First Aid Kit
• Mother's Hug (II)

  Recover 150 HP and 3% HP at the start of every turn.
• Radish Launcher

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

  Increase healing power of scrolls by 20%.
• Charming Aura (Red)

  2012 Valentines day limited aura, increase all damage 2%.
• Vertical Light

  Reduce 15 HP damage taken.
• Bell of Fortune

  6% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• S55 Mirror of Fantasy

  Increases damage by 6% and accuracy by 5%. Has a 7% chance to convert any damage taken to HP.
• Smart Phone
• Shigu Twin Blades
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• 2011 Carnival Jiegu

  Ninja Saga 2nd Anniversary Carnival! Each turn recover 100 HP and 100 CP.
• Scroll: Tenku
• Ferret Tail
• Ishiyama Lantern

  Reduce damage taken by 49.
• Rose Cloak

  Restores 80 CP at the start of every turn. Converts 8% of damage taken into CP.
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• Swordfish