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 :

• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Mercy Of Libra

  Recover 2% HP at the start of every turn. And recover 3% HP with every Charge.
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• First-Aid Kit

  100% of the purchase price will be donated to Japan earthquake relief.
• Sengoku Flag

  Increases damage by 4%. Each turn recover 120 HP.
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• Red Shell
• Christmas Pudding

  Recover 200 HP and 200 CP at the start of every turn but reduce agility by 10.
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Black Silver Electric Guitar
• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.
• S16 Umbra Steel Wheel

  Reduce damage taken by 270.
• Mini Octopus
• Scroll: Taiin
• Cerberus's Flame

  80% chance to burn enemy who attack user - Reduce 3% HP for 2 turns.
• Hidden Green Umbrella
• Spartan Shield

  Restore 100 HP every turn. Reduce damage taken by 5%.
• S58 Scroll of Shadows

  Increases damage by 6% and dodge rate by 5%.
• S70 Magical Cobweb

  Restores CP by 3%. 30% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• S24 Junsei Ring

  Increase max. HP by 5%.
• Fighting spirit Taiko
• Raccoon Tail
• S18 Evil Spirit Wings

  Increase 10% critical rate.
• Patriot Aegis

  A mythical shield that can block even the most vicious attacks. Increases max HP by 3%. Has a 60% chance to recover 5% of maximum HP and reduces damage taken by 75.
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.
• Sakon Three Blades