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 :

• Large Wooden Hammer
• Shoguns Badge Gourd

  Increase Max. HP & CP by 3%
• Carp Flag
• Ancient Shinobi War Decorated

  Additional 60 HP damage upon all attack.
• Mech of Wing

  Reduce damage taken by 10%.
• Ocean Ring

  Increase 1% accuracy.
  Additional 2 HP damage upon all attack.
• Red Shell
• Nightmare Grudge

  Ignore 4% targets dodge.
• Evil Claw Hammer

  Reduce 7 HP damage taken.
• Victorious Crown

  Increases accuracy by 4% and recover HP by 3%. Has 13% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Spinning Wheel

  Recover user's max HP by 1% each turn. Increases user's max CP by 2%. Converts 10% of damage taken into CP.
• S17 Scorching Sun Lantern

  Recover 10% cp after dealing damage.
• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• Green Koi
• 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.
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• S11 Wood Spirit's Bow

  Increase critical chance 13%.
• Sack of Hearts

  Cupids sack of hearts. Recovers 3% HP every turn. Has 5% chance to convert any damage to HP.
• Triple Taiko

  Increases Max. HP by 4% and healing power of scrolls by 100%.
• Vampire Cloak

  Increase healing power of scrolls by 100.
• Light of Eternal

  Increase Max.HP 3%. Recover 3% SP at the start of every turn.
• S10 Frostguard's Bow

  A magical bow that has a very long range. Reduce target 8% CP on every weapon attack.
• White Metal Hammer
• Scroll: Flying Phoenix
• Mini Goldfish
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Little Shikigami

  Increases accuracy by 5%. Adds 80 damage in all of your attacks.