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 :

• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• S54 Ebony Nunchaku

  Increases damage by 7%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Nutcracker

  Increases Max. HP by 4% and damage by 3%.
• Scroll: Kochin
• Mirror of Shamisen
• Sanmoku Gourd

  Reduce damage taken by 65.
• Sagittarius Hunting Set

  Increases dodge rate by 4%. Additional 80 HP damage on all attacks.
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• Hidden Green Umbrella
• S10 Frostguard's Shield

  Shield of the valiant warrior Tundra. Increase agility by 2. Has 17% Chance to stun target when attack with weapon for 1 turn.
• Wooden Hammer
• Christmas Bag

  Reduce damage taken by 10.
• Charming Aura (Pink)

  2012 Valentines day limited aura, reduce damage 2%.
• Merlins Magical book

  Increases attack damage 5%
• S65 Transcendent Flame Wings

  Remnants of a powerful fire spirit. Increases attack damage by 7% and increase 20% Combustion chance. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S16 Umbra Steel Wheel

  Reduce damage taken by 270.
• Scroll: Sun of Campaign
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• Writing Brush
• Heart Aura

  Hidden feelings emerges! Recovers 2% of the user's max HP and 100 HP every turn.
• Chakra Ancestor Flame

  Reduce damage taken by 175. Has 5% chance to convert damage taken to HP positively.
• S9 Akazonke Gunbai

  Increase 4% critical rate and ignore 4% targets dodge.
• Water Symbol Guitar
• S57 Magatama Gunbai

  Increases dodge rate by 5% and restores 4% of users max HP every turn.
• Folk Folding Fan
• Tai Chi Gold Gourd

  Restores HP by 4%. Increase healing power of scrolls by 500%. Reduce target 3% CP on every weapon attack.