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 :

• War Flag: Furinkazan
• Scroll: Red Curse seal
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• Harvest Treasure Bag

  Reduce damage taken by 140. Recover 5% extra CP when charge.
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• S58 Scroll of Shadows

  Increases damage by 6% and dodge rate by 5%.
• S51 Enchanted Winged Carapace

  Increases accuracy by 3%. Recover 4% HP at the start of every turn.
• Spiked Blade

  Increases dodge and critical chance by 4%. Recovers 70 HP each turn.
• Scroll: Grassland
• Matsuyama Fan

  Ignore enemys dodge rate by 6%.
• Christmas Trumpet

  Ignore enemys dodge rate by 4% and recover 3% CP with every charge.
• Black Metal Hammer
• S83 Four Wings

  Increase dodge rate by 8%.
• Banana Back Item

  Banana Back Item
• Engagement Ring

  Additional 20 HP damage upon all attack.
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• Wind Storm Raijinco
• Christmas Chimney

  4% chance to freeze enemy who attacks user (1 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Dark Blade

  Increase 2% critical rate and ignore 2% of targets dodge.
• White Metal Hammer
• Thanksgiving Candle

  Has 15% chance to absorb 2% HP of enemy who attack you. Increase 7% Combustion chance.
• Sakura Gold Jewellery

  Increases users agility by 1. Restores 3% of users max HP. Has 6% chance to convert damage taken to HP positively.
• Triple Taiko

  Increases Max. HP by 4% and healing power of scrolls by 100%.
• Soul of Egg Hunting Beast

  2012 Egg Hunting Event
• Tail of Hachibi

  Forged with chakra of the legendary tailed beast, Hachibi. Increase critical chance by 15% but reduce max. HP by 20%.
• Extra Large Presents Bag

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