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 :

• New Year Kadomatsu

  Recover 100 HP and 100 CP at the start of every turn.
• S81 Wheel of Glory

  Reduce damage taken by 200. Increase Combustion chance by 15%. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Shishimai Back

  Restores 3% of users max HP.Has 4% chance to convert damage taken to HP positively.
• Colorful Moai Egg

  Reduce damage taken by 100 and recover 10% extra CP when charge.
• Wooden Repeating Crossbow
• Ancient Pipe

  5% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Sakura Rain Battle Umbrella
• Carnival Fan

  Dance with the Fan during Ninja Saga Anniversary Carnival! Increase all attack damage by 3%.
• Wine Gourd
• S12 Blood Evil Gourd

  Increase max. HP by 5%.
• Champion Cup!

  Ultimate prize for Champions.
• S65 Transcendent Flame Wings

  Remnants of a powerful fire spirit. Increases attack damage by 7% and increase 20% Combustion chance. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Roasted Turkey

  Restore 20 HP every turn.
• Yawata Magatama

  Increase 3% accuracy.
  Additional 20 HP damage upon all attack.
• Straw Hat

  Increase dodge rate by 3%.
• Decorate Battle Umbrella
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• Mother's Hug

  Recover 100 HP and 2% HP at the start of every turn.
• Harvest Treasure Bag

  Reduce damage taken by 140. Recover 5% extra CP when charge.
• Venom Ghost

  Has 5% chance to convert damage taken to HP positively. Recover HP by 100 every turn.
• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• Peom Fan

  Reduce 46 HP damage taken.
• Engagement Ring

  Additional 20 HP damage upon all attack.
• Christmas Pudding

  Recover 200 HP and 200 CP at the start of every turn but reduce agility by 10.
• Crimson Lanterns

  Increase attack damage by 6%. Has 6% chance to convert damage taken to HP positively.
• S33 Book of Fate

  Increase Max. HP & CP by 4%