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 :

• Thorn hammer
• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• Ferret Tail
• Flag of the Burning Legion

  Reduce 3% damage taken and 12% chance to absorb 2% HP of enemy who attack you.
• Samurai Painted Wood

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• Extra Large Presents Bag

  A large present bag, but nobody knows what it contains.
• Hidden Green Umbrella
• S12 Ancient Blood Evil Gourd

  Increase max. HP by 5%. But reduce Max.CP by 1%.
• S8 Underworld Bulwark

  A phantom shield with demon soul. Reduce damage taken by 10%.
• S45 Oblivion Ward

  Increases Max. HP by 3% and Max. CP by 6%.
• Yolanda Rescue First Aid Kit
• Scroll: Red Curse seal
• Water Shark Skis
• Cheerful Snowman

  Increase Max. CP by 20%. Recover 2% HP at the start of every turn. but reduce max. HP by 12%.
• S60 Amber Jewel Wings

  Increases attack damage by 10% and increase 5% Combustion chance.
• S14 Yabusa Knife

  Increases 4% attack damage and ignore 4% of targets dodge.
• S2 Solar Aura

  Increase agility by 3 and accuracy by 7% .
• Black Silver Electric Guitar
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• S10 Kikyo Umbrella

  6% chance to convert damage taken to HP positively.
• Christmas Pudding

  Recover 200 HP and 200 CP at the start of every turn but reduce agility by 10.
• S16 Umbra Steel Wheel

  Reduce damage taken by 270.
• Cancer Assegai

  Increases critical rate by 4%. Reduce damage taken by 3%.
• 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.
• Ronin Idol

  Reduce damage taken by 100 and restores 4% of users max HP.