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 :

• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.
• Little Shikigami

  Increases accuracy by 5%. Adds 80 damage in all of your attacks.
• Gemini Halo Glyph

  Increases damage by 4%. Reduce damage taken by 65.
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Sakura Fan

  Recover 20 HP and 150 CP at the start of every turn.
• S18 Evil Spirit Shield

  Reduce 14% damage taken.
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• Christmas Treasure Bag

  Increase agility by 1.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%.
• S62 Black Steel Swords

  Restores 5% of users max HP.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• Chakra Magatama

  Increase 2% accuracy.
  Additional 5 HP damage upon all attack.
• Curved Spear
• Yolanda Rescue First Aid Kit
• Fairy Fishing Rod

  Each turn recover 3% HP and 100 CP
• Thanksgiving Balloons

  Increase max. HP by 2%.
• S2 Scroll Capsule

  Increase attack damage by 8%. Recover 7% cp after dealing damage.
• Colorful Snowflake

  Increase agility by 1. Has 15% chance to freeze enemy who attacks user (2 turns). Frozen target cannot move but damage taken is reduced by 80%.
• Mace of Pandemonium

  Increases attack damage by 6%. Has 4% chance to convert damage taken to HP positively.
• Three-stringed Lute Guitar
• Luckey windmill

  Each turn recover 120 HP and 120 CP.
• Flag: Dragon Symbol
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• Cerberus's Flame

  80% chance to burn enemy who attack user - Reduce 3% HP for 2 turns.
• Force of Taotie

  Reduce damage taken by 7%.