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 :

• S80 Struggle Flag

  Recover HP by 2%. Recover 7% HP with every Charge.
• Extra Large Presents Bag

  A large present bag, but nobody knows what it contains.
• Leopard Cat Tail
• Scroll: Kochin
• Charmed Heart

  Theres no escaping love. Increases accuracy by 5%. Adds 40 damage in all of your attacks.
• Shinobi Curse Battle Umbrella
• S67 Omni Cloud

  Increase accuracy by 6% and dodge rate by 5%.
• Puppet: Hakuki (7 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• Bronze Torch of Zeus

  Increase mission XP reward by 200
• Universal Backpack

  Increase healing power of scrolls by 100%. Each turn recover 140 HP.
• Blue Shell
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• Christmas Wreath

  Increase agility by 1 and Max HP by 1%.
• Universal Saber

  Increases users agility by 1. Recover 150 HP at the start of every turn.
• 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.
• S56 Curse Brush

  A legendary Ink Brush that has the ability to materialize drawings. Increase critical rate by 5% and accuracy by 6%.
• Swire Raijinco
• Shigu Twin Blades
• S13 Ancient Kishu Twin Blades

  Increase accuracy by 6%
• 4th Anniversary Back Item

  Ninja Saga 4th Anniversary edition! Recover 50 HP and 150 CP at the start of every turn.
• Black Silver Electric Guitar
• S14 Ancient Yabusa Knife

  Increases attack damage 4% and ignore 3% of targets dodge.
• Blue Cloud Umbrella

  Ignore 6% targets dodge.
• S55 Mirror of Fantasy

  Increases damage by 6% and accuracy by 5%. Has a 7% chance to convert any damage taken to HP.
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• S15 Frozen Large Sword

  Increase 7% purify chance.