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 :

• Blue Wolf Tail
• Knot of Avenger

  20% chance to absorb 2% HP of enemy who attack you. 20% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• S9 Akazonke Gunbai

  Increase 4% critical rate and ignore 4% targets dodge.
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• Red Koi
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• Carrot Launcher

  Increase agility by 1. (Easter 2011 Limited Edition)
• S80 Struggle Flag

  Recover HP by 2%. Recover 7% HP with every Charge.
• Mimosa
• Flour Stick
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• Mini Scroll
• Carnival Fan

  Dance with the Fan during Ninja Saga Anniversary Carnival! Increase all attack damage by 3%.
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Great Wooden Hammer (7 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Snowflake

  3% chance to freeze enemy who attack user (1 turn). (Frozen target cannot move but damage taken is reduced by 80%.)
• Crimson Lanterns

  Increase attack damage by 6%. Has 6% chance to convert damage taken to HP positively.
• Charming Aura (Pink)

  2012 Valentines day limited aura, reduce damage 2%.
• Mirror of Thousand Hands
• 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.
• Holy Wings

  Increase accuracy by 4% and dodge rate by 3%.
• Red Shell
• Scroll: Terminated Rock
• Thanksgiving Candle

  Has 15% chance to absorb 2% HP of enemy who attack you. Increase 7% Combustion chance.
• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every charge.
• Scroll: Guren
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.