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
• Sakura Gold Jewellery

  Increases users agility by 1. Restores 3% of users max HP. Has 6% chance to convert damage taken to HP positively.
• Silver Torch of Zeus

  Increase mission gold reward by 300.
• Star Dawn Harp

  Increases users agility by 1. Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover HP by 2% when being put on a debuff.
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Dragon Crucifix Spear
• Mech of Wing

  Reduce damage taken by 10%.
• Wooden Repeating Crossbow
• Puppet: Hakuki

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Golden-bound Cudgel
• Fighting spirit Taiko
• Carrot Time Bomb

  Has 8% chance to freeze enemy who attacks user (1 turn). Frozen target cannot move but damage taken is reduced by 80%. Has 5% chance to convert damage taken to HP positively.
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Shishimai Back

  Restores 3% of users max HP.Has 4% chance to convert damage taken to HP positively.
• Ferret Tail
• Ramen Shop Lantern
• S40 Gozen Breeze Back Item

  Recover 7% HP with every Charge.
• Golden Torch of Zeus

  Recover 150 HP every turn
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• Smoothbore Musket

  Increase 10% damage.
  Reduce 3% damage taken.
• Light Cry Raijinco
• Village Red Lantern
• Wood Top
• Paper Envoy of God

  Increases attack damage and reduces damage received by 4%
• S17 Scorching Sun Scroll

  Has 30% chance to absorb 1% HP of enemy who attack you.