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 :

• S20 Empire Battle Gear

  6% chance to convert damage taken to HP positively.
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• S74 Burning Wings

  Increases attack damage by 4% and Combustion chance by 25%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Flour Stick
• Mech of Wing

  Reduce damage taken by 10%.
• Venom Ghost

  Has 5% chance to convert damage taken to HP positively. Recover HP by 100 every turn.
• Ice Cystal Raijinco
• Super Rabbit Doll

  Increase damage by 9%.
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Wooden Repeating Crossbow
• Osuzu Shinsen

  Ninja Saga 2nd Anniversary Carnival! Increase all attack damage by 5%.
• S14 Profound Tentacles

  35% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• S43 Extreme Lotus

  The back item contains 30% chance to absorb 3% HP of enemy which makes attack on you.
• Black Double Gun

  Ignore enemys dodge rate by 3%. Increase accuracy by 3%.
• Mini Evil Wing

  Exclusive Halloween item - the devils wings that frighten enemy, and hence reduce their damage done on you by 5%.
• Blue Shell
• Fairy Wings

  Fairy wings that owned by a fairy
• Scroll: Terminated Rock
• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Tail of Kyubi

  Forged with chakra of the legendary tailed beast, Kyubi. 100% immune to Burn effect and increase 3% Combustion chance.
• Turkey Tail
• 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.
• Father's Heart (II)

  Reduce damage taken by 7%. Reduce damage taken by 150.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• S57 Magatama Gunbai

  Increases dodge rate by 5% and restores 4% of users max HP every turn.
• Santa Gift Bag

  Reduce damage taken by 30.