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 :

• Harvest Treasure Bag

  Reduce damage taken by 140. Recover 5% extra CP when charge.
• Water Energy Skis
• Shigu Twin Blades
• S45 Oblivion Ward

  Increases Max. HP by 3% and Max. CP by 6%.
• Cornucopia

  Increase healing power of scrolls by 100%. Has 6% chance to convert damage taken to HP positively.
• Scroll: Red Curse seal
• S76 Buckler and Sword

  Increase max.HP by 12% but reduce max. CP by 2%.
• Patriot Aegis

  A mythical shield that can block even the most vicious attacks. Increases max HP by 3%. Has a 60% chance to recover 5% of maximum HP and reduces damage taken by 75.
• S23 Meschiken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Sakura Dance

  Increase damage by 3% and max. HP by 4%.
• 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.
• Clouds And Mist Raijinco
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• 4th Anniversary Back Item

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

  Increases accuracy by 5%. Adds 80 damage in all of your attacks.
• Wooden Repeating Crossbow
• Dark World Hammer
• Purple Mixing Yellow Umbrella
• Axe Hammer suit

  Increases damage and accuracy by 6%. Recover 50 HP at the start of every turn.
• Fighting spirit Taiko
• Mech of Wing

  Reduce damage taken by 10%.
• 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)
• Colorful Moai Egg

  Reduce damage taken by 100 and recover 10% extra CP when charge.
• Orange Kikyo Skis
• Father's Heart

  Reduce damage taken by 6%.
• Ronin Idol

  Reduce damage taken by 100 and restores 4% of users max HP.