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 :

• Ancient Shinobi War Decorated

  Additional 60 HP damage upon all attack.
• FIFA Whistle

  Recover 100 CP at the start of every turn and reduces damage taken by 80.
• S21 Rokulin Gunbai

  Ignore enemys dodge rate by 8%.
• S34 Wooden Name Tag

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Charming Aura (Black)

  2012 Valentines day limited aura, increase critical chance 2%.
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Hanami Taiko

  2011 Hanami Festival - Rhythm! Recover HP & CP by 10 every turn.
• Wood Top
• 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%
• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• Bear of Affection

  Increase dodge rate by 3% and ignore target dodge by 3%.
• Great Wooden Hammer (3 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Purple Mixing Yellow Umbrella
• Jingle Bell

  Reduce 2% damage taken. Recover 3% HP at the start of every turn.
• Swordfish
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• Scroll: Messenger

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• S3 Fossil of Magatama

  Increase purify chance by 6%. Has 10% chance to convert damage taken to HP positively.
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• Umiyuki Painted Wood

  Reduce 24 HP damage taken.
• Gunbai: World Peace
• Ferret Tail
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Christmas Treasure Bag

  Increase agility by 1.
• S16 King Kong Ring

  Recover HP by 1% and reduces damage received by 4%.