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 :

• S5 Umbrella of Spiritual Pulse

  Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover 5% CP every turn if current CP is less than 50%. Has 8% chance to reduce skill cooldown by 1 turn at the start of each turn. (Not effective on talent skills)
• Scroll: Kochin
• First-Aid Kit

  100% of the purchase price will be donated to Japan earthquake relief.
• Heart Aura

  Hidden feelings emerges! Recovers 2% of the user's max HP and 100 HP every turn.
• Sakon Three Blades
• S80 Struggle Flag

  Recover HP by 2%. Recover 7% HP with every Charge.
• Flame Soul Electric Guitar
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• Scroll: Grassland
• GM Goldfish

  GM Goldfish
• S74 Burning Wings

  Increases attack damage by 4% and Combustion chance by 25%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S40 Gozen Breeze Back Item

  Recover 7% HP with every Charge.
• Purple Dragon umbrella
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Sanmoku Gourd

  Reduce damage taken by 65.
• Hide Guitar
• S72 Hero Twin Axe

  Increase 12% Combustion Chance and recover 3% HP at the start of every turn. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Cupid Wing

  Increase critical chance 4% and critical damage 10%.
• Gunbai: World Peace
• Hanami Fan

  Ignore 4% targets dodge and increase max. HP by 2%.
• Curved Spear
• Successor Fan

  Restores HP & CP by 2%. Has 7% chance to freeze enemy who attacks user (2 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Ritual Taiko
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• Swordfish
• Carrot Time Bomb

  Has 8% chance to freeze enemy who attacks user (1 turn). Frozen target cannot move but damage taken is reduced by 80%. Has 5% chance to convert damage taken to HP positively.
• Businessman Luggage