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 :

• Three Ring Magatama

  Increase 2% accuracy.
  Additional 12 HP damage upon all attack.
• Mini Evil Wing

  Exclusive Halloween item - the devils wings that frighten enemy, and hence reduce their damage done on you by 5%.
• Dark World Hammer
• Wind Storm Raijinco
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Dark Cry Raijinco
• Flame Soul Electric Guitar
• S10 Ancient Kikyo Umbrella

  6% chance to convert damage taken into health. But reduce Max.CP by 2%.
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Fighting spirit Taiko
• Sakon Three Blades
• Dark Evil Sickle

  Exclusive Halloween item - the devils sickle that has 10% chance to absorb 1% HP of enemy who attack you.
• Santa Gift Bag

  Reduce damage taken by 30.
• S2 Scroll Capsule

  Increase attack damage by 8%. Recover 7% cp after dealing damage.
• Ancient Shinobi War Decorated

  Additional 60 HP damage upon all attack.
• White Metal Hammer
• Ninja Bag

  Increase healing power of scrolls by 20%.
• Neptunes Healing

  Amazing power from Neptune. 3% chance to convert damage taken to HP positively and recover 3% HP at the start of every turn.
• Trident
• Childhood Memories

  Mothers Day 2011 Limited Edition
• GM back item
• Senior Kari Bagpack

  Reduce 3% damage taken.
• Champion Cup!

  Ultimate prize for Champions.
• Jaws

  Ignore 4% targets dodge.
• S63 Stormbringer

  Increases dodge rate by 5%. Has 50% chance to absorb 2% HP of enemy who attack you.
• Chakra Message Stick
• Holy Wings

  Increase accuracy by 4% and dodge rate by 3%.