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 :

• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.
• Cornucopia

  Increase healing power of scrolls by 100%. Has 6% chance to convert damage taken to HP positively.
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• Scroll: Rikugo
• Engagement Ring

  Additional 20 HP damage upon all attack.
• Hanami Lantern

  2011 Hanami Festival - Shine! Reduce damage taken by 15.
• Falcon
• S52 Gold Dragon Scroll

  Reduce damage taken by 7%. Ignore targets dodge rate by 5%.
• S3 Energetical Can

  Increase attack damage by 10% and Combustion chance by 18%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Sengoku Flag

  Increases damage by 4%. Each turn recover 120 HP.
• S51 Enchanted Winged Carapace

  Increases accuracy by 3%. Recover 4% HP at the start of every turn.
• Crimson Lanterns

  Increase attack damage by 6%. Has 6% chance to convert damage taken to HP positively.
• Bell of Beast

  Recover HP by 3%. 15% chance to absorb 3% HP of enemy who attack you.
• S43 Extreme Lotus

  The back item contains 30% chance to absorb 3% HP of enemy which makes attack on you.
• Cupid Wing

  Increase critical chance 4% and critical damage 10%.
• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• Spirit Flag

  An inspiring banner that boosts the holders morale. Increase critical chance and dodge rate by 3%.
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• Yolanda Rescue First Aid Kit
• S31 Yabusa Dual Head Spear

  Increase 4% damage and 4% critical rate.
• Smart Phone
• Sagittarius Hunting Set

  Increases dodge rate by 4%. Additional 80 HP damage on all attacks.
• Tailed Beast Chakra Crystal

  Increase 3% damage.
  Reduce 3% damage taken.
  Recover 2% HP each turn start.
• Turkey Tail
• Sakon Three Blades
• Blood Brush

  Increase 3% damage and increase healing power of scrolls by 10%.
• Childhood Memories

  Mothers Day 2011 Limited Edition