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 :

• Blue Shell
• Christmas Chimney

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

  Increase critical chance by 2% and dodge rate by 3%.
• Death Wooden Coffin
• S83 Four Wings

  Increase dodge rate by 8%.
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• Rose Bouquet

  Recover CP by extra 5% per charge
• S23 Meschiken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Sakura Rain Battle Umbrella
• S5 The Guider

  Increase purify chance by 7%. Recover 8% HP when purify. Recovers 4% of the user's max HP.
• S61 God Dragon Flag

  Increase critical rate by 6%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Red Koi
• Shigu Twin Blades
• S2 Demons erosion

  Recovers 4% of the users max HP every turn. Additional 100 damage on all attacks.
• Green Koi
• S54 Ebony Nunchaku

  Increases damage by 7%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Curved Spear
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Chakra Magatama

  Increase 2% accuracy.
  Additional 5 HP damage upon all attack.
• Big Cheese

  Recover CP after HP reduction. (Amount: 10% of HP reduction)
• Senior Kari Bagpack

  Reduce 3% damage taken.
• Bell of Fortune

  6% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• S64 Twin Pinnacle Spear

  Powerful spears that can pinpoint enemy's weaknesses. Increases accuracy by 12%. But reduce self dodge rate by 5%.
• Holiday Doll

  Expecting Santa in every year! Critical and dodge rate increase 3%.
• Orange Koi
• FIFA Whistle

  Recover 100 CP at the start of every turn and reduces damage taken by 80.