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 :

• Merlins Magical book

  Increases attack damage 5%
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• Zombie Hand

  Increase attack damage by 15%. But each turn reduce 200 HP and 300 CP.
• Big Cheese

  Recover CP after HP reduction. (Amount: 10% of HP reduction)
• Decorate Battle Umbrella
• S5 Possessed Koto

  Increase purify chance by 7%. Reduce jutsu CP consumption for 10%. Has 15% Chance to stun target when attack with weapon for 1 turn.
• Dark Evil Sickle

  Exclusive Halloween item - the devils sickle that has 10% chance to absorb 1% HP of enemy who attack you.
• Falcon
• Samurai Painted Wood

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Scroll: Fire and Earth
• Ancient Pipe

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

  Has 5% chance to convert damage taken to HP positively. Recover HP by 100 every turn.
• Black Koi
• Water Symbol Guitar
• S13 Slaughter Giant Axe

  Increase max.HP by 20% but reduce max. CP by 35%.
• Red Shuriken Skis
• Scroll: Rikugo
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.
• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• Umiyuki Painted Wood

  Reduce 24 HP damage taken.
• S41 Dragon Gunnery

  Increase 25% Combustion chance, Ignore enemys dodge rate by 5%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Leopard Cat Tail
• S16 King Kong Ring

  Recover HP by 1% and reduces damage received by 4%.
• Folk Folding Fan
• S7 Gorgeous Butterfly

  Increase agility by 2. Recover 20% extra CP when charge.
• S8 Ancient Scroll of Golden Snake

  Increase all attack damage by 4%, and Decrease damage taken by 4%. But reduce critical chance by 1%.
• Flame Soul Electric Guitar