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 :

• Dragon Crucifix Spear
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• Bear of Affection

  Increase dodge rate by 3% and ignore target dodge by 3%.
• Black Silver Electric Guitar
• Mother's Hug

  Recover 100 HP and 2% HP at the start of every turn.
• S43 Extreme Lotus

  The back item contains 30% chance to absorb 3% HP of enemy which makes attack on you.
• Wine Gourd
• Dark Cry Raijinco
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• Samurai Painted Wood

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Dark World Hammer
• Vertical Light

  Reduce 15 HP damage taken.
• Clouds And Mist Raijinco
• Native Drum

  5% chance to convert damage taken to HP positively.
• Christmas Chimney

  4% chance to freeze enemy who attacks user (1 turn). Frozen target cannot move but damage taken is reduced by 80%.
• S3 Fossil of Magatama

  Increase purify chance by 6%. Has 10% chance to convert damage taken to HP positively.
• Orange Kikyo Skis
• 2011 Carnival Jiegu

  Ninja Saga 2nd Anniversary Carnival! Each turn recover 100 HP and 100 CP.
• Jingle Bell

  Reduce 2% damage taken. Recover 3% HP at the start of every turn.
• Flag of the Burning Legion

  Reduce 3% damage taken and 12% chance to absorb 2% HP of enemy who attack you.
• S7 Gorgeous Butterfly

  Increase agility by 2. Recover 20% extra CP when charge.
• S74 Burning Wings

  Increases attack damage by 4% and Combustion chance by 25%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Musashi Twin Blades
• New Year Kadomatsu

  Recover 100 HP and 100 CP at the start of every turn.
• S18 Evil Spirit Wings

  Increase 10% critical rate.