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 :

• Scroll: Fire and Earth
• S10 Frostguard's Shield

  Shield of the valiant warrior Tundra. Increase agility by 2. Has 17% Chance to stun target when attack with weapon for 1 turn.
• Ishiyama Lantern

  Reduce damage taken by 49.
• Golden Torch of Zeus

  Recover 150 HP every turn
• Sealed Wood

  A back item which lost the original effectiveness.
• Dark World Hammer
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Black Silver Electric Guitar
• Shoguns Badge Gourd

  Increase Max. HP & CP by 3%
• Blue Wolf Tail
• S13 Ancient Kishu Twin Blades

  Increase accuracy by 6%
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• Charming Aura (Red)

  2012 Valentines day limited aura, increase all damage 2%.
• Spiked Blade

  Increases dodge and critical chance by 4%. Recovers 70 HP each turn.
• Rose Bouquet

  Recover CP by extra 5% per charge
• Emblem backpack (Yellow)

  Double mission XP reward in level 1 to level 20.
• Choco Tama

  Increase accuracy by 5% and increase healing power of scrolls by 25%.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%.
• Ritual Taiko
• Harvest Treasure Bag

  Reduce damage taken by 140. Recover 5% extra CP when charge.
• Wooden Repeating Crossbow
• First-Aid Kit

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

  An inspiring banner that boosts the holders morale. Increase critical chance and dodge rate by 3%.
• S56 Curse Brush

  A legendary Ink Brush that has the ability to materialize drawings. Increase critical rate by 5% and accuracy by 6%.
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• S9 Warring Empire Bulwark

  A strong and sturdy shield. Reduces damage taken by 35% but reduces the user's agility by 15.
• Carnival Fan

  Dance with the Fan during Ninja Saga Anniversary Carnival! Increase all attack damage by 3%.