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 :

• Fire Symbol Guitar
• Butterfly Wings
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Dual Blade of Fire

  Increase 3% damage made, recover self 2% HP each turn.
• Gruidae Wing

  Each turn recover 80 CP. Recover CP after HP reduction. (Amount: 8% of HP reduction)
• Mousetrap

  15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Ice Cystal Raijinco
• Childhood Memories

  Mothers Day 2011 Limited Edition
• Senior Kari Bagpack

  Reduce 3% damage taken.
• S12 Ancient Blood Evil Gourd

  Increase max. HP by 5%. But reduce Max.CP by 1%.
• S67 Omni Cloud

  Increase accuracy by 6% and dodge rate by 5%.
• Ninjas Stocking

  Increase 5% Combustion chance and attack damage by 3%.
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Red Shell
• First-Aid Kit

  100% of the purchase price will be donated to Japan earthquake relief.
• Huginn & Muninn

  Reduce 4% damage taken. Has 10% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Mini Octopus
• Choco Tama

  Increase accuracy by 5% and increase healing power of scrolls by 25%.
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• S52 Gold Dragon Scroll

  Reduce damage taken by 7%. Ignore targets dodge rate by 5%.
• Frost Soul Electric Guitar
• Three Ring Magatama

  Increase 2% accuracy.
  Additional 12 HP damage upon all attack.
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• Smoothbore Musket

  Increase 10% damage.
  Reduce 3% damage taken.
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• Mini Scroll