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 :

• Ancient Shinobi War Decorated

  Additional 60 HP damage upon all attack.
• Blue Cloud Umbrella

  Ignore 6% targets dodge.
• Frost Soul Electric Guitar
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• Water Shark Skis
• Butterfly Wings
• War Flag: World Peace
• Scroll: Fire and Earth
• Scroll and Blade

  Has 11% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills. Increase critical rate by 5%. 8% chances of using Jutsu without CP.
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• Spiked Blade

  Increases dodge and critical chance by 4%. Recovers 70 HP each turn.
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Drum of Euphoria

  Recover 3% HP at the start of every turn, and recover 3% HP with every Charge.
• Flag: Dragon Symbol
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• Ichimoku Gourd
• Straw Hat

  Increase dodge rate by 3%.
• War Flag: Syoshin

  Increase mission XP reward by 100.
• First-Aid Kit

  100% of the purchase price will be donated to Japan earthquake relief.
• Iron Tortoise Shell

  Reduce damage taken by 200.
• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• Thanksgiving Balloons

  Increase max. HP by 2%.
• Dark Cry Raijinco
• Knot of Avenger

  20% chance to absorb 2% HP of enemy who attack you. 20% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• S81 Wheel of Glory

  Reduce damage taken by 200. Increase Combustion chance by 15%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Stuff Bunny

  Increase Max. HP by 2% and Max. CP by 4%.
• Charming Aura (Red)

  2012 Valentines day limited aura, increase all damage 2%.