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 :

• Silver Torch of Zeus

  Increase mission gold reward by 300.
• Christmas Treasure Bag

  Increase agility by 1.
• Tai Chi Gold Gourd

  Restores HP by 4%. Increase healing power of scrolls by 500%. Reduce target 3% CP on every weapon attack.
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• Straw Hat

  Increase dodge rate by 3%.
• Blue Shell
• S13 Kishu Twin Blades

  Increase accuracy by 8%
• Brilliant Stock Pot

  Increase max. HP by 8% and purify chance by 2% but reduce max. CP by 8%.
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Cheerful Snowman

  Increase Max. CP by 20%. Recover 2% HP at the start of every turn. but reduce max. HP by 12%.
• Mini Octopus
• S76 Buckler and Sword

  Increase max.HP by 12% but reduce max. CP by 2%.
• White Guitar
• Wood Top
• Mini Evil Wing

  Exclusive Halloween item - the devils wings that frighten enemy, and hence reduce their damage done on you by 5%.
• Black Metal Hammer
• S59 Rejuvenating Blade Wings

  Increases Max. HP by 6% and Max. CP by 4%.
• Toxic Mushroom

  Increases damage by 10% but the user takes 200 HP damage every turn.
• Banana Back Item

  Banana Back Item
• S24 Junsei Ring

  Increase max. HP by 5%.
• Mother's Hug (II)

  Recover 150 HP and 3% HP at the start of every turn.
• Leopard Cat Tail
• Purple Dragon umbrella
• S2 Demons erosion

  Recovers 4% of the users max HP every turn. Additional 100 damage on all attacks.
• Light of Eternal

  Increase Max.HP 3%. Recover 3% SP at the start of every turn.