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 :

• Christmas Treasure Bag

  Increase agility by 1.
• Golden-bound Cudgel
• Tailed Beast Chakra Crystal

  Increase 3% damage.
  Reduce 3% damage taken.
  Recover 2% HP each turn start.
• Jaws

  Ignore 4% targets dodge.
• Death Wooden Coffin
• S9 Warring Empire Bulwark

  A strong and sturdy shield. Reduces damage taken by 35% but reduces the user's agility by 15.
• S8 Ancient Scroll of Golden Snake

  Increase all attack damage by 4%, and Decrease damage taken by 4%. But reduce critical chance by 1%.
• Red Shuriken Skis
• 2011 Fortune Lantern

  Ninja Saga 2nd Anniversary Carnival!
• Crystal Ice Mirror

  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%
• White Guitar
• S9 Warring Empire Guarding Bow

  An ancient enchanted bow with great range used in warfare. Increases accuracy by 10%. Restore 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%.
• Scroll: Kinjutsu I
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• Father's Heart (II)

  Reduce damage taken by 7%. Reduce damage taken by 150.
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• S55 Mirror of Fantasy

  Increases damage by 6% and accuracy by 5%. Has a 7% chance to convert any damage taken to HP.
• Scroll: Messenger (7 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Peom Fan

  Reduce 46 HP damage taken.
• Steel Frame Tail
• Hanagara Hagoita

  Increase max. HP by 3%.
• S39 Spike Hammer

  Increase accuracy by 10% but reduce max. HP by 10%.
• 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)
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Water Symbol Guitar
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.