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 :

• Master Scroll

  Restores HP & CP by 3%.
• S59 Rejuvenating Blade Wings

  Increases Max. HP by 6% and Max. CP by 4%.
• Carrot Launcher

  Increase agility by 1. (Easter 2011 Limited Edition)
• S52 Gold Dragon Scroll

  Reduce damage taken by 7%. Ignore targets dodge rate by 5%.
• Scroll: Genbu
• Choco Tama

  Increase accuracy by 5% and increase healing power of scrolls by 25%.
• Hanagara Dama

  Increase max. CP by 6%
• S23 Meschiken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Magical Wreath

  Recover HP by 2% and reduce 4% damage taken.
• Musashi Twin Blades
• Dark Blade

  Increase 2% critical rate and ignore 2% of targets dodge.
• S22 Shinnoto Monks Staff

  Increase 4% critical rate and reduces damage received by 4%.
• Soul of Egg Hunting Beast

  2012 Egg Hunting Event
• Mischievous Candy

  Increase accuracy by 3%. Increase healing power of scrolls by 50%.
• Mini Goldfish
• Writing Brush
• Super Rabbit Doll

  Increase damage by 9%.
• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Karasu Miya Falcon

  Increase dodge rate by 6%.
• Holiday Doll

  Expecting Santa in every year! Critical and dodge rate increase 3%.
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Evil Way Lute

  Has a 50% chance to recover 5% of maximum HP. Has 10% chance to absorb 3% HP
• S20 Empire Battle Gear

  6% chance to convert damage taken to HP positively.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• S1 Angelic Silverware

  Increase dodge rate by 5%. Reduce damage taken by 9%.