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.
• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• Four-Point Shuriken
• Cheerful Snowman

  Increase Max. CP by 20%. Recover 2% HP at the start of every turn. but reduce max. HP by 12%.
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• S76 Buckler and Sword

  Increase max.HP by 12% but reduce max. CP by 2%.
• Christmas Bag

  Reduce damage taken by 10.
• White Guitar
• 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.
• Blessed Kitty

  Bless on his master everyday, which increase 3% damage. Heal 1% HP in every turn.
• S29 Yanki Protective Magatama

  Increase accuracy by 8%
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• Flag of the Burning Legion

  Reduce 3% damage taken and 12% chance to absorb 2% HP of enemy who attack you.
• S13 Ancient Kishu Twin Blades

  Increase accuracy by 6%
• Death Wooden Coffin
• Sealing Pot

  Increases Max. HP by 4% and recover 3% HP at the start of every turn.
• 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.
• Mini Scroll
• Raijin Raijinco
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• GM Goldfish

  GM Goldfish
• Scroll: Flying Phoenix
• Champion Cup!

  Ultimate prize for Champions.
• Ghost Spider

  Reduce 72 HP damage taken.
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• Folding Paper Fan