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 :

• Apricot Pipa
• Yawata Magatama

  Increase 3% accuracy.
  Additional 20 HP damage upon all attack.
• Twins Sakura

  Ignore 5% targets dodge.
• Lucky Chess

  Has 5% chance to freeze enemy who attacks user (3 turn). Frozen target cannot move but damage taken is reduced by 80%. Each turn recover 100 HP and 100 CP.
• Star Dawn Harp

  Increases users agility by 1. Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover HP by 2% when being put on a debuff.
• Great Wooden Hammer

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• S26 Bashosen

  Increase 10% Combustion chance.
• Mother's Hug (II)

  Recover 150 HP and 3% HP at the start of every turn.
• Sakura Rain Battle Umbrella
• Drum of Euphoria

  Recover 3% HP at the start of every turn, and recover 3% HP with every Charge.
• Little Shikigami

  Increases accuracy by 5%. Adds 80 damage in all of your attacks.
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Tail Hunter Back Item

  Increase max. HP by 3%.
• Three-stringed Lute Guitar
• S42 Hanbing Hammer

  8% chance to convert damage taken to HP positively.
• Sanmoku Gourd

  Reduce damage taken by 65.
• Christmas Treasure Bag

  Increase agility by 1.
• Drum: Ako
• Dark Cry Raijinco
• Hanami Lantern

  2011 Hanami Festival - Shine! Reduce damage taken by 15.
• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• S59 Rejuvenating Blade Wings

  Increases Max. HP by 6% and Max. CP by 4%.
• Shinobi Curse Battle Umbrella
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• S3 Fossil of Magatama

  Increase purify chance by 6%. Has 10% chance to convert damage taken to HP positively.
• Toxic Spider Web

  10% chance to apply Restriction on enemies who attacks the user for 1 turn.
  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%
• Iron Tortoise Shell

  Reduce damage taken by 200.