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 :

• Mech of Wing

  Reduce damage taken by 10%.
• Wind Storm Raijinco
• Butterfly Wings
• S2 Solar Aura

  Increase agility by 3 and accuracy by 7% .
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Christmas Wreath

  Increase agility by 1 and Max HP by 1%.
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• Heian-kyo Shamisen
• S17 Scorching Sun Lantern

  Recover 10% cp after dealing damage.
• Axe Hammer suit

  Increases damage and accuracy by 6%. Recover 50 HP at the start of every turn.
• Scroll: Rikugo
• Giant Copper Coins

  Increase Mission gold reward by 30%.(Mission Only)
• Minotaurs Horn

  Recover 350 HP at the start of every turn. Has 15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.
• Gunbai: Gyoji
• Blue Crystal Wings

  Recover 15% extra CP when charge.
• Dark World Hammer
• Knot of Avenger

  20% chance to absorb 2% HP of enemy who attack you. 20% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• S34 Wooden Name Tag

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Ritual Taiko
• Deadwood Pipa
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• Trident
• Ink Cloud

  Additional 40 HP damage upon all attack.
• S43 Extreme Lotus

  The back item contains 30% chance to absorb 3% HP of enemy which makes attack on you.
• Water Shark Skis