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 :

• S11 Wood Spirit's Bow

  Increase critical chance 13%.
• S34 Wooden Name Tag

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Paper Windmill

  Additional 20 HP damage upon all attack.
• Flame Blade Raijinco
• Black Silver Electric Guitar
• Blood Brush

  Increase 3% damage and increase healing power of scrolls by 10%.
• S21 Rokulin Gunbai

  Ignore enemys dodge rate by 8%.
• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• 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)
• Spartan Shield

  Restore 100 HP every turn. Reduce damage taken by 5%.
• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.
• Prestige Purple Dragon

  Increase attack damage by 5%. Recover 100 HP at the start of every turn.
• Sakura Gold Jewellery

  Increases users agility by 1. Restores 3% of users max HP. Has 6% chance to convert damage taken to HP positively.
• S9 Warring Empire Bulwark

  A strong and sturdy shield. Reduces damage taken by 35% but reduces the user's agility by 15.
• Charmed Heart

  Theres no escaping love. Increases accuracy by 5%. Adds 40 damage in all of your attacks.
• Bat Back Item

  Back item design with reference from Halloween - Bats. Increase 5% dodge rate and decrease damage 5% at the same time.
• Decorate Battle Umbrella
• S74 Burning Wings

  Increases attack damage by 4% and Combustion chance by 25%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S9 Warring Empire Guarding Bow

  An ancient enchanted bow with great range used in warfare. Increases accuracy by 10%. Restore 100 HP every turn.
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• S1 Helianthus

  Restores HP & CP by 5%. Increase purify chance by 5%.
• Childhood Memories

  Mothers Day 2011 Limited Edition
• Civet Cat Tail
• Smart Phone
• Bell of Beast

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