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 :

• S16 Umbra Fire Wheel

  Additional 170 HP damage upon all attack.
• Matsuyama Fan

  Ignore enemys dodge rate by 6%.
• S15 Frozen Large Sword

  Increase 7% purify chance.
• Great Wooden Hammer (3 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Dual Blade of Fire

  Increase 3% damage made, recover self 2% HP each turn.
• Orange Koi
• Ninjas Stocking

  Increase 5% Combustion chance and attack damage by 3%.
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• Black Double Gun

  Ignore enemys dodge rate by 3%. Increase accuracy by 3%.
• Vertical Light

  Reduce 15 HP damage taken.
• Christmas Bag

  Reduce damage taken by 10.
• Sealed Wood

  A back item which lost the original effectiveness.
• Fairy Wings

  Fairy wings that owned by a fairy
• Bat Back Item

  Back item design with reference from Halloween - Bats. Increase 5% dodge rate and decrease damage 5% at the same time.
• Dark World Hammer
• Three-stringed Lute Guitar
• S9 Warring Empire Bulwark

  A strong and sturdy shield. Reduces damage taken by 35% but reduces the user's agility by 15.
• Curved Spear
• S67 Omni Cloud

  Increase accuracy by 6% and dodge rate by 5%.
• Balloon Rabbit Doll

  Has 8% chance to convert damage taken to HP positively.
• S10 Frostguard's Shield

  Shield of the valiant warrior Tundra. Increase agility by 2. Has 17% Chance to stun target when attack with weapon for 1 turn.
• Trident
• Wine Gourd
• Colorful Snowflake

  Increase agility by 1. Has 15% chance to freeze enemy who attacks user (2 turns). Frozen target cannot move but damage taken is reduced by 80%.
• Mother's Hug

  Recover 100 HP and 2% HP at the start of every turn.
• Victorious Crown

  Increases accuracy by 4% and recover HP by 3%. Has 13% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.