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 :

• Chakra Kanawa

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S65 Transcendent Flame Wings

  Remnants of a powerful fire spirit. Increases attack damage by 7% and increase 20% Combustion chance. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Smart Phone
• Spinning Wheel

  Recover user's max HP by 1% each turn. Increases user's max CP by 2%. Converts 10% of damage taken into CP.
• Gummy Bear

  Restores CP by 2%. Reduce damage taken by 100.
• Heart Aura

  Hidden feelings emerges! Recovers 2% of the user's max HP and 100 HP every turn.
• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• Sakura Straw Hat

  Recovers 2% of users max HP every turn.
• Rose Bouquet

  Recover CP by extra 5% per charge
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• Scroll: Flying Phoenix
• Tail of Kyubi

  Forged with chakra of the legendary tailed beast, Kyubi. 100% immune to Burn effect and increase 3% Combustion chance.
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• Deadwood Pipa
• Angel Heart (Black)

  Reduce target 8% CP on every weapon attack.
• Sakura Lantern

  Increase Combustion chance by 10%.(Minimum requirement of 1 Attribute Point in Fire to activate combustion effect). Has 10% chance to absorb 2% HP of enemy who attack you.
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Togatsuki Paper Fan

  Increase max. CP by 10%.
• Black Metal Hammer
• Hanagara Hagoita

  Increase max. HP by 3%.
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• S19 Magatama Soul Barrel

  Increase 4% critical rate and ignore 4% targets dodge.
• S17 Scorching Sun Scroll

  Has 30% chance to absorb 1% HP of enemy who attack you.
• White Metal Hammer
• Hanami Dango

  Reduces damage received by 7%. Restore 85 HP every turn.
• Colorful Snowflake

  Increase agility by 1. Has 15% chance to freeze enemy who attacks user (2 turns). Frozen target cannot move but damage taken is reduced by 80%.