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 :

• Businessman Luggage
• S14 Profound Pincers

  20% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%.
• S10 Frostguard's Shield

  Shield of the valiant warrior Tundra. Increase agility by 2. Has 17% Chance to stun target when attack with weapon for 1 turn.
• S19 Magatama Soul Barrel

  Increase 4% critical rate and ignore 4% targets dodge.
• S69 Skull Cloak

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• Soul of Egg Hunting Beast

  2012 Egg Hunting Event
• 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.
• Scroll: Fire and Earth
• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.
• Umiyuki Painted Wood

  Reduce 24 HP damage taken.
• Purple Mixing Yellow Umbrella
• Water Symbol Guitar
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• Gummy Bear

  Restores CP by 2%. Reduce damage taken by 100.
• Skull Twins

  7% chance to convert damage taken to HP positively and 20% chance to absorb 1% HP of enemy who attack you.
• Fairy Fishing Rod

  Each turn recover 3% HP and 100 CP
• Water Energy Skis
• Decorate Battle Umbrella
• S50 Blood Shade Magatama

  Created with blood and molten lava, the blood shade magatama consumes the life force of anyone with malicious intent. Has a 8% chance to absorb 10% of the attackers max HP and 8% chance to convert any damage taken to HP.
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• Hidden Green Umbrella
• Cerberus's Flame

  80% chance to burn enemy who attack user - Reduce 3% HP for 2 turns.
• Scroll: Kinjutsu I
• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every 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%.