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 :

• S12 Ancient Blood Evil Gourd

  Increase max. HP by 5%. But reduce Max.CP by 1%.
• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• Justice and Freedom

  Flag of the United States of America which symbolizes freedom and liberty. Recover 3% HP with every charge. Increases critical rate by 3%. Reduces damage taken by 50.
• Big Cheese

  Recover CP after HP reduction. (Amount: 10% of HP reduction)
• Carrot Time Bomb

  Has 8% chance to freeze enemy who attacks user (1 turn). Frozen target cannot move but damage taken is reduced by 80%. Has 5% chance to convert damage taken to HP positively.
• Angel Wings

  Increase 3% attack damage and ignore 3% targets dodge.
• Dark Plate Twin Blades
• S60 Amber Jewel Wings

  Increases attack damage by 10% and increase 5% Combustion chance.
• Christmas Deer

  Increase critical chance 2% and critical damage 6%.
• Star Dawn Harp

  Increases users agility by 1. Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover HP by 2% when being put on a debuff.
• Black Koi
• Gunbai: World Peace
• S73 Smite Evil Shield

  Has 25% chance to absorb 2% HP of enemy who attack you. 8% chance to convert damage taken to HP positively.
• Cheerful Snowman

  Increase Max. CP by 20%. Recover 2% HP at the start of every turn. but reduce max. HP by 12%.
• Scroll: Messenger (7 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• Great Wooden Hammer (7 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• Cupid Wing

  Increase critical chance 4% and critical damage 10%.
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• S54 Ebony Nunchaku

  Increases damage by 7%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Death Wooden Coffin
• Egg Hunter Basket

  Increase 6% accuracy. (Easter 2011 Limited Edition)
• Businessman Luggage
• Merlins Magical book

  Increases attack damage 5%
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• S9 Warring Empire Bulwark

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