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 :

• Ink Cloud

  Additional 40 HP damage upon all attack.
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• Red Shuriken Skis
• Spinning Wheel

  Recover user's max HP by 1% each turn. Increases user's max CP by 2%. Converts 10% of damage taken into CP.
• Decorative Rope
• Samurai Painted Wood

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Beast Mace
• S26 Bashosen

  Increase 10% Combustion chance.
• 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.
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.
• Dark Evil Sickle

  Exclusive Halloween item - the devils sickle that has 10% chance to absorb 1% HP of enemy who attack you.
• Gemini Halo Glyph

  Increases damage by 4%. Reduce damage taken by 65.
• S72 Hero Twin Axe

  Increase 12% Combustion Chance and recover 3% HP at the start of every turn. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Extra Large Presents Bag

  A large present bag, but nobody knows what it contains.
• Sakura wah

  Restores HP by 3% and CP by 99 each turn.
• Hanami Folding Fan

  2011 Hanami Festival - Usagi! Increase dodge rate and critical rate by 3%.
• War Flag: Furinkazan
• Karasu Miya Falcon

  Increase dodge rate by 6%.
• Purple Mixing Yellow Umbrella
• Basic Jounin Battle Gear
• Scroll: Red Curse seal
• Tailed Beast Chakra Crystal

  Increase 3% damage.
  Reduce 3% damage taken.
  Recover 2% HP each turn start.
• Thanksgiving Candle

  Has 15% chance to absorb 2% HP of enemy who attack you. Increase 7% Combustion chance.
• S1 Angelic Silverware

  Increase dodge rate by 5%. Reduce damage taken by 9%.
• Dark Blade

  Increase 2% critical rate and ignore 2% of targets dodge.
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• Giant Copper Coins

  Increase Mission gold reward by 30%.(Mission Only)