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 :

• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.
• Mech of Wing

  Reduce damage taken by 10%.
• Mini Scroll
• S40 Gozen Breeze Back Item

  Recover 7% HP with every Charge.
• Clear Cross

  Increase 3% purify chance. Each turn recover 150 HP and 150 CP.
• Big Cask

  Increase max.HP by 15% but reduce max. CP by 5%.
• GM Goldfish

  GM Goldfish
• Tailed Beast Chakra Crystal

  Increase 3% damage.
  Reduce 3% damage taken.
  Recover 2% HP each turn start.
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• Paper Windmill

  Additional 20 HP damage upon all attack.
• Sakura Lantern

  Increase Combustion chance by 10%.(Minimum requirement of 1 Attribute Point in Fire to activate combustion effect). Has 10% chance to absorb 2% HP of enemy who attack you.
• Musashi Twin Blades
• S46 Holy Drum

  Reduce damage taken by 4%. Increase chance to restrict enemy for 1 turn by 20%. Targets with “Restriction” will not be able to use any skills.
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Justice and Freedom

  Flag of the United States of America which symbolizes freedom and liberty. Recover 3% HP with every charge. Increases critical rate by 3%. Reduces damage taken by 50.
• Jaws

  Ignore 4% targets dodge.
• Flame Blade Raijinco
• Ninjas Stocking

  Increase 5% Combustion chance and attack damage by 3%.
• Silver Torch of Zeus

  Increase mission gold reward by 300.
• Ukon Three Blades
• Scroll: Kochin
• Christmas Chimney

  4% chance to freeze enemy who attacks user (1 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Ghost Spider

  Reduce 72 HP damage taken.
• Scroll: Grassland