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 :

• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• Golden Torch of Zeus

  Recover 150 HP every turn
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Father's Heart (II)

  Reduce damage taken by 7%. Reduce damage taken by 150.
• Seal Nightmare Wing

  Ignore 4% targets dodge.
• Star Dawn Harp

  Increases users agility by 1. Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover HP by 2% when being put on a debuff.
• Toxic Spider Web

  10% chance to apply Restriction on enemies who attacks the user for 1 turn.
  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%
• S23 Meschiken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Clouds And Mist Raijinco
• Flame Blade Raijinco
• Writing Brush
• Ichimoku Gourd
• Raijin Raijinco
• Hanami Taiko

  2011 Hanami Festival - Rhythm! Recover HP & CP by 10 every turn.
• Blue Wolf Tail
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Shishimai Back

  Restores 3% of users max HP.Has 4% chance to convert damage taken to HP positively.
• Wooden Repeating Crossbow
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• S11 Wood Spirit's Shield

  Increase max. HP by 9% and 20% chance to absorb 3% HP of enemy who attack you.
• Tailed Beast Chakra Crystal

  Increase 3% damage.
  Reduce 3% damage taken.
  Recover 2% HP each turn start.
• Sanmoku Gourd

  Reduce damage taken by 65.
• Red Koi
• Raccoon Tail
• Puppet: Hakuki (7 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.