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 :

• Yawata Magatama

  Increase 3% accuracy.
  Additional 20 HP damage upon all attack.
• New Year Kadomatsu

  Recover 100 HP and 100 CP at the start of every turn.
• S9 Warring Empire Bulwark

  A strong and sturdy shield. Reduces damage taken by 35% but reduces the user's agility by 15.
• 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.
• S20 Empire Battle Gear

  6% chance to convert damage taken to HP positively.
• S16 Umbra Steel Wheel

  Reduce damage taken by 270.
• Scroll: Terminated Rock
• Aries Taiko

  A magical taiko used in celebrations during the Aries zodiac months. Recovers 50 HP every turn and reduces damage taken by 25.
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• Twins Sakura

  Ignore 5% targets dodge.
• War Flag: Syoshin

  Increase mission XP reward by 100.
• Little Shikigami

  Increases accuracy by 5%. Adds 80 damage in all of your attacks.
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• GM back item
• Folk Folding Fan
• S60 Amber Jewel Wings

  Increases attack damage by 10% and increase 5% Combustion chance.
• Firefox Tail
• Ninja Bag

  Increase healing power of scrolls by 20%.
• Sealed Wood

  A back item which lost the original effectiveness.
• S42 Tendo Tips

  Increases attack damage and reduces damage received by 5%.
• Nightmare Grudge

  Ignore 4% targets dodge.
• Ice Cystal Raijinco
• Angel Heart (Black)

  Reduce target 8% CP on every weapon attack.
• Fighting spirit Taiko
• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• Mini Evil Wing

  Exclusive Halloween item - the devils wings that frighten enemy, and hence reduce their damage done on you by 5%.
• S24 Junsei Ring

  Increase max. HP by 5%.