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 :

• S76 Buckler and Sword

  Increase max.HP by 12% but reduce max. CP by 2%.
• Big Cask

  Increase max.HP by 15% but reduce max. CP by 5%.
• S67 Omni Cloud

  Increase accuracy by 6% and dodge rate by 5%.
• Childhood Memories

  Mothers Day 2011 Limited Edition
• Extra Large Presents Bag

  A large present bag, but nobody knows what it contains.
• Screw Pattern Skis
• Tail Hunter Back Item

  Increase max. HP by 3%.
• Fairy Fishing Rod

  Each turn recover 3% HP and 100 CP
• Hidden Green Umbrella
• Mech of Wing

  Reduce damage taken by 10%.
• S68 Supreme Faerie Wings

  Recover 20% extra CP when charge. Has 10% chance to convert damage taken to HP positively.
• Champion Cup!

  Ultimate prize for Champions.
• Blue Shell
• Peom Fan

  Reduce 46 HP damage taken.
• S11 Wood Spirit's Shield

  Increase max. HP by 9% and 20% chance to absorb 3% HP of enemy who attack you.
• S57 Magatama Gunbai

  Increases dodge rate by 5% and restores 4% of users max HP every turn.
• S15 Frozen Large Sword

  Increase 7% purify chance.
• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every charge.
• Dark Plate Twin Blades
• Village Red Lantern
• S14 Profound Pincers

  20% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• Iron Tortoise Shell

  Reduce damage taken by 200.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• Griffin Thunderball

  Increases critical rate by 3% and dodge rate by 3%.
• Firefox Tail
• Mini Evil Wing

  Exclusive Halloween item - the devils wings that frighten enemy, and hence reduce their damage done on you by 5%.