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 :

• Iron Tortoise Shell

  Reduce damage taken by 200.
• Black Silver Electric Guitar
• S16 Umbra Steel Wheel

  Reduce damage taken by 270.
• Call of the Angel

  Reduce damage taken by 100. Has 6% chance to convert damage taken to HP positively.
• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• Fire Symbol Guitar
• Choco Tama

  Increase accuracy by 5% and increase healing power of scrolls by 25%.
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• S28 Orochi Statue

  Increase attack damage by 4%, and recover HP by 1%.
• Orange Koi
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• Holiday Doll

  Expecting Santa in every year! Critical and dodge rate increase 3%.
• Scroll: Rikugo
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.
• S45 Oblivion Ward

  Increases Max. HP by 3% and Max. CP by 6%.
• Light of Eternal

  Increase Max.HP 3%. Recover 3% SP at the start of every turn.
• Water Energy Skis
• S38 Genrei Fan

  Increase max.CP by 50% but reduce max. HP by 20%.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• S20 Empire Battle Gear

  6% chance to convert damage taken to HP positively.
• Thanksgiving Candle

  Has 15% chance to absorb 2% HP of enemy who attack you. Increase 7% Combustion chance.
• Christmas Deer

  Increase critical chance 2% and critical damage 6%.
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• Gunbai: Gyoji
• Puppet: Hakuki (3 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• S10 Kikyo Umbrella

  6% chance to convert damage taken to HP positively.
• First-Aid Kit

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