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 :

• Purple Mixing Yellow Umbrella
• Cupid Wing

  Increase critical chance 4% and critical damage 10%.
• Scroll: Guren
• Mirror of Shamisen
• Vampire Cloak

  Increase healing power of scrolls by 100.
• Cheerful Snowman

  Increase Max. CP by 20%. Recover 2% HP at the start of every turn. but reduce max. HP by 12%.
• Large Wooden Hammer
• Hide Guitar
• Firefox Tail
• Blue Shell
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Gummy Bear

  Restores CP by 2%. Reduce damage taken by 100.
• Father's Heart (II)

  Reduce damage taken by 7%. Reduce damage taken by 150.
• Hanami Taiko

  2011 Hanami Festival - Rhythm! Recover HP & CP by 10 every turn.
• Shoguns Badge Gourd

  Increase Max. HP & CP by 3%
• Scroll: Red Curse seal
• Grand Light Gourd

  Increase 3% damage
• Zombie Hand

  Increase attack damage by 15%. But each turn reduce 200 HP and 300 CP.
• Swire Raijinco
• Celestial Wood Raijinco
• Virgos Eternal Wings

  Increases agility by 1. Increases users attack damage by 3%.
• Dark Evil Sickle

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

  Increase 5% Combustion chance and attack damage by 3%.
• Hanami Folding Fan

  2011 Hanami Festival - Usagi! Increase dodge rate and critical rate by 3%.
• Mech of Wing

  Reduce damage taken by 10%.
• S50 Blood Shade Magatama

  Created with blood and molten lava, the blood shade magatama consumes the life force of anyone with malicious intent. Has a 8% chance to absorb 10% of the attackers max HP and 8% chance to convert any damage taken to HP.
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.