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 :

• Green Koi
• Shinobi Curse Battle Umbrella
• S7 Gorgeous Butterfly

  Increase agility by 2. Recover 20% extra CP when charge.
• Cupid Wing

  Increase critical chance 4% and critical damage 10%.
• Cancer Assegai

  Increases critical rate by 4%. Reduce damage taken by 3%.
• Basic Jounin Battle Gear
• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every charge.
• S48 Titans Hammer

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

  Additional 60 HP damage upon all attack.
• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• Luckey windmill

  Each turn recover 120 HP and 120 CP.
• Santa Gift Bag

  Reduce damage taken by 30.
• Evil Claw Hammer

  Reduce 7 HP damage taken.
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Axe Hammer suit

  Increases damage and accuracy by 6%. Recover 50 HP at the start of every turn.
• Drum: Ako
• Cheerful Snowman

  Increase Max. CP by 20%. Recover 2% HP at the start of every turn. but reduce max. HP by 12%.
• Gunbai: Gyoji
• Folk Folding Fan
• Flag: Dragon Symbol
• Senior Kari Bagpack

  Reduce 3% damage taken.
• S13 Kishu Twin Blades

  Increase accuracy by 8%
• Super Rabbit Doll

  Increase damage by 9%.
• S62 Black Steel Swords

  Restores 5% of users max HP.
• Tai Chi Gold Gourd

  Restores HP by 4%. Increase healing power of scrolls by 500%. Reduce target 3% CP on every weapon attack.
• Dark World Hammer
• Red Shell