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 :

• Red Shuriken Skis
• Force of Taowu

  Increases Max. HP by 4% and Max. CP by 4%.
• Ghost Spider

  Reduce 72 HP damage taken.
• Thanksgiving Balloons

  Increase max. HP by 2%.
• Scroll: Posion Attack
• Master Scroll

  Restores HP & CP by 3%.
• S51 Enchanted Winged Carapace

  Increases accuracy by 3%. Recover 4% HP at the start of every turn.
• Harvest Treasure Bag

  Reduce damage taken by 140. Recover 5% extra CP when charge.
• S14 Yabusa Knife

  Increases 4% attack damage and ignore 4% of targets dodge.
• New Year Kadomatsu

  Recover 100 HP and 100 CP at the start of every turn.
• S75 Trifecta Swords

  It gives off a strange feeling of vigor. Restores CP by 3%. Increases max CP by 7%.
• MegaJingleBell

  A glorious Christmas artifact which can be used in battle. Ignores 5% of enemys dodge rate. Recovers 2% of users max HP every turn.
• Three Ring Magatama

  Increase 2% accuracy.
  Additional 12 HP damage upon all attack.
• Ritual Taiko
• Scroll: Messenger

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• S12 Ancient Blood Evil Gourd

  Increase max. HP by 5%. But reduce Max.CP by 1%.
• Paper Windmill

  Additional 20 HP damage upon all attack.
• Colorful Moai Egg

  Reduce damage taken by 100 and recover 10% extra CP when charge.
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Universal Backpack

  Increase healing power of scrolls by 100%. Each turn recover 140 HP.
• S10 Frostguard's Bow

  A magical bow that has a very long range. Reduce target 8% CP on every weapon attack.
• S26 Bashosen

  Increase 10% Combustion chance.
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• Scroll: Tenku
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• Love Missile

  Additional 60 HP damage upon all attack.