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 :

• Water Shark Skis
• Evil Claw Hammer

  Reduce 7 HP damage taken.
• Apple Candy

  Increases damage by 5%. Has 3% chance to convert damage taken to HP positively.
• Sealing Pot

  Increases Max. HP by 4% and recover 3% HP at the start of every turn.
• Charming Aura (Black)

  2012 Valentines day limited aura, increase critical chance 2%.
• S20 Empire Battle Gear

  6% chance to convert damage taken to HP positively.
• Python Scales Raijinco
• Three-stringed Lute Guitar
• Village Red Lantern
• S72 Hero Twin Axe

  Increase 12% Combustion Chance and recover 3% HP at the start of every turn. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• S76 Buckler and Sword

  Increase max.HP by 12% but reduce max. CP by 2%.
• Togatsuki Paper Fan

  Increase max. CP by 10%.
• S2 Ancient Bone Claw

  An ancient bone that emanates great power. Increases accuracy by 8%. Recovers 100 HP every turn.
• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.
• S46 Holy Drum

  Reduce damage taken by 4%. Increase chance to restrict enemy for 1 turn by 20%. Targets with “Restriction” will not be able to use any skills.
• Toxic Village Poison Potion
• Chakra Magatama

  Increase 2% accuracy.
  Additional 5 HP damage upon all attack.
• Frost Soul Electric Guitar
• 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.
• Sakura Straw Hat

  Recovers 2% of users max HP every turn.
• Father's Heart

  Reduce damage taken by 6%.
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• Light Cry Raijinco
• Sand Gourd
• Hanagara Hagoita

  Increase max. HP by 3%.
• Christmas Treasure Bag

  Increase agility by 1.
• S21 Rokulin Gunbai

  Ignore enemys dodge rate by 8%.