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 :

• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• Sand Gourd
• 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)
• Leos Recurve Bow

  Increases damage by 4% and dodge rate by 1%.
• S59 Rejuvenating Blade Wings

  Increases Max. HP by 6% and Max. CP by 4%.
• Nutcracker

  Increases Max. HP by 4% and damage by 3%.
• Scroll: Taiin
• GM back item
• S62 Black Steel Swords

  Restores 5% of users max HP.
• Ronin Idol

  Reduce damage taken by 100 and restores 4% of users max HP.
• Water Energy Skis
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• Gunbai: Gyoji
• S80 Struggle Flag

  Recover HP by 2%. Recover 7% HP with every Charge.
• Enternal Love Scroll

  Increase 5% Combustion chance and reduce 1% damage taken.
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• Carrot Launcher

  Increase agility by 1. (Easter 2011 Limited Edition)
• Tail of Jyubi

  Forged with chakra of the legendary tailed beast, Jyubi. Increase attack damage by 15% but reduce max. CP by 30%.
• New Year Kadomatsu

  Recover 100 HP and 100 CP at the start of every turn.
• S45 Oblivion Ward

  Increases Max. HP by 3% and Max. CP by 6%.
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• Toxic Mushroom

  Increases damage by 10% but the user takes 200 HP damage every turn.
• Vertical Light

  Reduce 15 HP damage taken.
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Swire Raijinco