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 :

• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• GM Goldfish

  GM Goldfish
• Dark Blade

  Increase 2% critical rate and ignore 2% of targets dodge.
• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• Scroll: Messenger

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Puppet: Hakuki (7 Days)

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

  Increase agility by 1. (Easter 2011 Limited Edition)
• S20 Empire Battle Gear

  6% chance to convert damage taken to HP positively.
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Shadow Umbrella
• Scroll: Messenger (3 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Orange Koi
• Griffin Thunderball

  Increases critical rate by 3% and dodge rate by 3%.
• Sealing the soul barrel
• Ocean Ring

  Increase 1% accuracy.
  Additional 2 HP damage upon all attack.
• Wood Top
• Mimosa
• Love Ribbon

  Additional 40 HP damage upon all attack.
• Apple Candy

  Increases damage by 5%. Has 3% chance to convert damage taken to HP positively.
• Sanmoku Gourd

  Reduce damage taken by 65.
• Ultimate Taiko

  Recover 120 HP at the start of every turn. Has 15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Swordfish
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• Iron Tortoise Shell

  Reduce damage taken by 200.
• Gemini Halo Glyph

  Increases damage by 4%. Reduce damage taken by 65.