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 :

• 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)
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• S69 Skull Cloak

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• Ancient Pipe

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

  Reduces damage taken by 3%. Converts 9% of damage taken into CP.
• S14 Profound Tentacles

  35% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Osuzu Shinsen

  Ninja Saga 2nd Anniversary Carnival! Increase all attack damage by 5%.
• Christmas Treasure Bag

  Increase agility by 1.
• Little Shikigami

  Increases accuracy by 5%. Adds 80 damage in all of your attacks.
• Shadow Twin Blades
• Champion Cup!

  Ultimate prize for Champions.
• Scroll: Kochin
• Decorative Rope
• S43 Extreme Lotus

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

  Additional 20 HP damage upon all attack.
• S10 Frostguard's Bow

  A magical bow that has a very long range. Reduce target 8% CP on every weapon attack.
• Charming Aura (Red)

  2012 Valentines day limited aura, increase all damage 2%.
• Sealing Pot

  Increases Max. HP by 4% and recover 3% HP at the start of every turn.
• S7 Gorgeous Butterfly

  Increase agility by 2. Recover 20% extra CP when charge.
• Fighting spirit Taiko
• Scroll: Flying Phoenix
• Blue Cloud Umbrella

  Ignore 6% targets dodge.
• Mischievous Candy

  Increase accuracy by 3%. Increase healing power of scrolls by 50%.
• S5 Umbrella of Spiritual Pulse

  Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover 5% CP every turn if current CP is less than 50%. Has 8% chance to reduce skill cooldown by 1 turn at the start of each turn. (Not effective on talent skills)
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.