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 :

• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Sand Gourd
• Chakra Magatama

  Increase 2% accuracy.
  Additional 5 HP damage upon all attack.
• Yolanda Rescue First Aid Kit
• Heian-kyo Shamisen
• Smart Phone
• Puppet: Hakuki (7 Days)

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

  Increases attack damage 5%
• Father's Heart (II)

  Reduce damage taken by 7%. Reduce damage taken by 150.
• S51 Enchanted Winged Carapace

  Increases accuracy by 3%. Recover 4% HP at the start of every turn.
• Blue Wolf Tail
• Peom Fan

  Reduce 46 HP damage taken.
• S61 God Dragon Flag

  Increase critical rate by 6%. Has 20% chance to apply Restriction on enemies who attacks the user for 1 turn.
• Griffin Thunderball

  Increases critical rate by 3% and dodge rate by 3%.
• S43 Extreme Lotus

  The back item contains 30% chance to absorb 3% HP of enemy which makes attack on you.
• Black Metal Hammer
• Flame Blade Raijinco
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• FIFA Whistle

  Recover 100 CP at the start of every turn and reduces damage taken by 80.
• S12 Ancient Blood Evil Gourd

  Increase max. HP by 5%. But reduce Max.CP by 1%.
• Shoguns Badge Gourd

  Increase Max. HP & CP by 3%
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• S57 Magatama Gunbai

  Increases dodge rate by 5% and restores 4% of users max HP every turn.
• Love Missile

  Additional 60 HP damage upon all attack.
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• Hidden Green Umbrella
• Beast Mace