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 :

• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• Smart Phone
• Mimosa
• S80 Struggle Flag

  Recover HP by 2%. Recover 7% HP with every Charge.
• S18 Evil Spirit Wings

  Increase 10% critical rate.
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.
• Egg Hunter Basket

  Increase 6% accuracy. (Easter 2011 Limited Edition)
• Black Double Gun

  Ignore enemys dodge rate by 3%. Increase accuracy by 3%.
• Black Koi
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• S21 Rokulin Gunbai

  Ignore enemys dodge rate by 8%.
• Scroll: Fire and Earth
• Holy Wings

  Increase accuracy by 4% and dodge rate by 3%.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%.
• Python Scales Raijinco
• Fairy Wings

  Fairy wings that owned by a fairy
• Chakra Message Stick
• Spiked Blade

  Increases dodge and critical chance by 4%. Recovers 70 HP each turn.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• Little Shikigami

  Increases accuracy by 5%. Adds 80 damage in all of your attacks.
• GM Phone

  GM Phone
• Great Wooden Hammer (7 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Champion Cup!

  Ultimate prize for Champions.
• S8 Scroll of Golden Snake

  Increase all attack damage by 4%. Decrease damage taken by 4%.
• Drum: Ako