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 :

• Sakon Three Blades
• Mischievous Candy

  Increase accuracy by 3%. Increase healing power of scrolls by 50%.
• Puppet: Hakuki (3 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• Hidden Green Umbrella
• Ghost Spider

  Reduce 72 HP damage taken.
• Call of the Angel

  Reduce damage taken by 100. Has 6% chance to convert damage taken to HP positively.
• Lovely Santa Bag

  A bag that resembles Santa Claus, it emanates faint revitalizing aura. Restores 140 HP and 30 CP at the start of every turn.
• Mother's Hug (II)

  Recover 150 HP and 3% HP at the start of every turn.
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• Cupid Wing

  Increase critical chance 4% and critical damage 10%.
• Wooden Repeating Crossbow
• Wood Top
• Drum: Ako
• S69 Skull Cloak

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• S15 Ancient Seitenken

  Recover CP after HP reduction. (Amount: 16% of HP reduction)
• Great Stinger

  Reduces damage taken by 3%. Converts 9% of damage taken into CP.
• S18 Evil Spirit Wings

  Increase 10% critical rate.
• Spartan Shield

  Restore 100 HP every turn. Reduce damage taken by 5%.
• Yawata Magatama

  Increase 3% accuracy.
  Additional 20 HP damage upon all attack.
• Ancient Pipe

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Umiyuki Painted Wood

  Reduce 24 HP damage taken.
• Dark Evil Sickle

  Exclusive Halloween item - the devils sickle that has 10% chance to absorb 1% HP of enemy who attack you.
• Dragon Crucifix Spear
• Golden-bound Cudgel
• Jingle Bell

  Reduce 2% damage taken. Recover 3% HP at the start of every turn.
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.