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 :

• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• Apple Candy

  Increases damage by 5%. Has 3% chance to convert damage taken to HP positively.
• Merlins Magical book

  Increases attack damage 5%
• Knot of Avenger

  20% chance to absorb 2% HP of enemy who attack you. 20% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• GM Goldfish

  GM Goldfish
• Sealed Wood

  A back item which lost the original effectiveness.
• Red Koi
• Golden-bound Cudgel
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.
• Falcon
• Carrot Launcher

  Increase agility by 1. (Easter 2011 Limited Edition)
• Hidden Green Umbrella
• Wooden Hammer
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Tail Hunter Back Item

  Increase max. HP by 3%.
• Clear Cross

  Increase 3% purify chance. Each turn recover 150 HP and 150 CP.
• 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.
• S43 Extreme Lotus

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

  6% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Angel Wings

  Increase 3% attack damage and ignore 3% targets dodge.
• Mirror of Thousand Hands
• S45 Oblivion Ward

  Increases Max. HP by 3% and Max. CP by 6%.
• Sealing the soul barrel
• S75 Trifecta Swords

  It gives off a strange feeling of vigor. Restores CP by 3%. Increases max CP by 7%.
• S44 Earth Caller

  Increases attack damage by 4% and max HP by 5%.
• Twins Sakura

  Ignore 5% targets dodge.