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 :

• Blue Wolf Tail
• Light of Eternal

  Increase Max.HP 3%. Recover 3% SP at the start of every turn.
• Fire Symbol Guitar
• Scroll: Messenger (3 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Sakura Rain Battle Umbrella
• Ichimoku Gourd
• S72 Hero Twin Axe

  Increase 12% Combustion Chance and recover 3% HP at the start of every turn. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Heart Aura

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

  Increase 5% Combustion chance and attack damage by 3%.
• Blue Crystal Wings

  Recover 15% extra CP when charge.
• Choco Tama

  Increase accuracy by 5% and increase healing power of scrolls by 25%.
• Charming Aura (Pink)

  2012 Valentines day limited aura, reduce damage 2%.
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• Chromaflake

  Increases damage by 5% and dodge rate by 3%.
• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.
• Swordfish
• Love Missile

  Additional 60 HP damage upon all attack.
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Cornucopia

  Increase healing power of scrolls by 100%. Has 6% chance to convert damage taken to HP positively.
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Paper Envoy of God

  Increases attack damage and reduces damage received by 4%
• Civet Cat Tail
• Virgos Eternal Wings

  Increases agility by 1. Increases users attack damage by 3%.
• 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.
• Vampire Cloak

  Increase healing power of scrolls by 100.
• S40 Gozen Breeze Back Item

  Recover 7% HP with every Charge.