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 :

• Scroll: Kinjutsu I
• Big Cheese

  Recover CP after HP reduction. (Amount: 10% of HP reduction)
• Firefox Tail
• S14 Profound Pincers

  20% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Love Ribbon

  Additional 40 HP damage upon all attack.
• S16 Umbra Steel Wheel

  Reduce damage taken by 270.
• Sengoku Flag

  Increases damage by 4%. Each turn recover 120 HP.
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• Frost Soul Electric Guitar
• Seal Nightmare Wing

  Ignore 4% targets dodge.
• S9 Warring Empire Guarding Bow

  An ancient enchanted bow with great range used in warfare. Increases accuracy by 10%. Restore 100 HP every turn.
• Orange Kikyo Skis
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• Ferret Tail
• Puppet: Spider
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Scroll: Posion Attack
• Yawata Magatama

  Increase 3% accuracy.
  Additional 20 HP damage upon all attack.
• S2 Ancient Bone Claw

  An ancient bone that emanates great power. Increases accuracy by 8%. Recovers 100 HP every turn.
• Force of Taotie

  Reduce damage taken by 7%.
• Three Ring Magatama

  Increase 2% accuracy.
  Additional 12 HP damage upon all attack.
• Dark Evil Sickle

  Exclusive Halloween item - the devils sickle that has 10% chance to absorb 1% HP of enemy who attack you.
• War Flag: World Peace
• Twins Sakura

  Ignore 5% targets dodge.
• Sakon Three Blades
• Water Shark Skis
• 4th Anniversary Back Item

  Ninja Saga 4th Anniversary edition! Recover 50 HP and 150 CP at the start of every turn.