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 :

• Spirit Flag

  An inspiring banner that boosts the holders morale. Increase critical chance and dodge rate by 3%.
• Angel Heart (White)

  16% chance to absorb 2% HP of enemy who attack you.
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• Ghost Spider

  Reduce 72 HP damage taken.
• Black Double Gun

  Ignore enemys dodge rate by 3%. Increase accuracy by 3%.
• Puppet: Spider
• Charming Aura (Red)

  2012 Valentines day limited aura, increase all damage 2%.
• Curved Spear
• Big Cheese

  Recover CP after HP reduction. (Amount: 10% of HP reduction)
• S24 Junsei Ring

  Increase max. HP by 5%.
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Wine Gourd
• Scroll: Sun of Campaign
• White Metal Hammer
• Dual Blade of Fire

  Increase 3% damage made, recover self 2% HP each turn.
• Jingle Bell

  Reduce 2% damage taken. Recover 3% HP at the start of every turn.
• Raijin Raijinco
• Hanami Taiko

  2011 Hanami Festival - Rhythm! Recover HP & CP by 10 every turn.
• Scroll: Posion Attack
• 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.
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• S3 Energetical Can

  Increase attack damage by 10% and Combustion chance by 18%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• Cerberus's Flame

  80% chance to burn enemy who attack user - Reduce 3% HP for 2 turns.
• Wings of Eternal Eclipse

  Increases critical chance by 3%. Ignores 6% of the targets dodge rate.
• Fire Symbol Guitar
• MegaJingleBell

  A glorious Christmas artifact which can be used in battle. Ignores 5% of enemys dodge rate. Recovers 2% of users max HP every turn.