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 :

• Axe Hammer suit

  Increases damage and accuracy by 6%. Recover 50 HP at the start of every turn.
• Sealing the soul barrel
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Flame Soul Electric Guitar
• Heian-kyo Shamisen
• Merlins Magical book

  Increases attack damage 5%
• Call of the Angel

  Reduce damage taken by 100. Has 6% chance to convert damage taken to HP positively.
• Ocean Ring

  Increase 1% accuracy.
  Additional 2 HP damage upon all attack.
• Turkey Tail
• Ancient Shinobi War Decorated

  Additional 60 HP damage upon all attack.
• Folk Folding Fan
• Sakura Fan

  Recover 20 HP and 150 CP at the start of every turn.
• Shigu Twin Blades
• S39 Spike Hammer

  Increase accuracy by 10% but reduce max. HP by 10%.
• Ice Cystal Raijinco
• 2011 Fortune Lantern

  Ninja Saga 2nd Anniversary Carnival!
• Wooden Repeating Crossbow
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• Neptunes Healing

  Amazing power from Neptune. 3% chance to convert damage taken to HP positively and recover 3% HP at the start of every turn.
• Scroll: Yinyang Seal
• Bronze Torch of Zeus

  Increase mission XP reward by 200
• Peom Fan

  Reduce 46 HP damage taken.
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• Shinobi Curse Battle Umbrella
• Cursed Devil

  Increase attack damage by 15%. But reduce max. HP and max. CP by 10%
• S17 Scorching Sun Lantern

  Recover 10% cp after dealing damage.
• S43 Extreme Lotus

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