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 :

• Death Wooden Coffin
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• White Metal Hammer
• Childhood Memories

  Mothers Day 2011 Limited Edition
• S32 Black Senbu

  Recover HP by 4% and reduces damage received by 3%.
• Great Wooden Hammer (7 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• S9 Akazonke Gunbai

  Increase 4% critical rate and ignore 4% targets dodge.
• Scroll: Kochin
• Kettle
• Mech of Wing

  Reduce damage taken by 10%.
• Steel Frame Tail
• Christmas Bag

  Reduce damage taken by 10.
• Native Horn

  Increase max. CP by 3%, Recover 1% HP with every Charge.
• S11 Wood Spirit's Bow

  Increase critical chance 13%.
• Scroll and Blade

  Has 11% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills. Increase critical rate by 5%. 8% chances of using Jutsu without CP.
• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• Black Koi
• Hanami Dango

  Reduces damage received by 7%. Restore 85 HP every turn.
• S19 Magatama Soul Barrel

  Increase 4% critical rate and ignore 4% targets dodge.
• S53 Frostfire Soul

  Increases combustion chance by 15%. Has a 10% chance to freeze enemies who attacks the user for 1 turn. Frozen targets cannot act but takes 80% reduced damage.
• Flame Soul Electric Guitar
• Prestige Purple Dragon

  Increase attack damage by 5%. Recover 100 HP at the start of every turn.
• Golden Torch of Zeus

  Recover 150 HP every turn
• Sagittarius Hunting Set

  Increases dodge rate by 4%. Additional 80 HP damage on all attacks.
• S16 King Kong Ring

  Recover HP by 1% and reduces damage received by 4%.
• Gunbai: World Peace
• Justice and Freedom

  Flag of the United States of America which symbolizes freedom and liberty. Recover 3% HP with every charge. Increases critical rate by 3%. Reduces damage taken by 50.