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 :

• Skull Twins

  7% chance to convert damage taken to HP positively and 20% chance to absorb 1% HP of enemy who attack you.
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• S28 Orochi Statue

  Increase attack damage by 4%, and recover HP by 1%.
• Blizzard

  Increases users agility by 1. Has 7% chance to convert damage taken into HP.
• Scroll: Messenger

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Great Stinger

  Reduces damage taken by 3%. Converts 9% of damage taken into CP.
• S43 Extreme Lotus

  The back item contains 30% chance to absorb 3% HP of enemy which makes attack on you.
• S75 Trifecta Swords

  It gives off a strange feeling of vigor. Restores CP by 3%. Increases max CP by 7%.
• Kettle
• S24 Junsei Ring

  Increase max. HP by 5%.
• S13 Slaughter Giant Axe

  Increase max.HP by 20% but reduce max. CP by 35%.
• Rose Bouquet

  Recover CP by extra 5% per charge
• Fairy Wings

  Fairy wings that owned by a fairy
• Red Shuriken Skis
• Zombie Hand

  Increase attack damage by 15%. But each turn reduce 200 HP and 300 CP.
• Call of the Angel

  Reduce damage taken by 100. Has 6% chance to convert damage taken to HP positively.
• 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%.
• Axe Hammer suit

  Increases damage and accuracy by 6%. Recover 50 HP at the start of every turn.
• Ramen Shop Lantern
• Mother's Hug (II)

  Recover 150 HP and 3% HP at the start of every turn.
• Purple Mixing Yellow Umbrella
• S8 Sign of Corruption

  Wings with an ominous aura. Increases agility by 3.
• S8 Scroll of Golden Snake

  Increase all attack damage by 4%. Decrease damage taken by 4%.
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Great Wooden Hammer (3 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Holy Wings

  Increase accuracy by 4% and dodge rate by 3%.
• Dark Plate Twin Blades