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 :

• Snowflake

  3% chance to freeze enemy who attack user (1 turn). (Frozen target cannot move but damage taken is reduced by 80%.)
• Osuzu Shinsen

  Ninja Saga 2nd Anniversary Carnival! Increase all attack damage by 5%.
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Shishimai Back

  Restores 3% of users max HP.Has 4% chance to convert damage taken to HP positively.
• Leos Recurve Bow

  Increases damage by 4% and dodge rate by 1%.
• Pirate Skull Flag

  Increase 6% purify chance. Reduce damage taken by 5%.
• Scroll: Fire and Earth
• Chakra Message Stick
• Flame Soul Electric Guitar
• Red Shuriken Skis
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Dark World Hammer
• Christmas Bag

  Reduce damage taken by 10.
• Fairy Wings

  Fairy wings that owned by a fairy
• S43 Extreme Lotus

  The back item contains 30% chance to absorb 3% HP of enemy which makes attack on you.
• S67 Omni Cloud

  Increase accuracy by 6% and dodge rate by 5%.
• Hanami Fan

  Ignore 4% targets dodge and increase max. HP by 2%.
• Trident
• Scroll: Messenger (3 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• Jingle Bell

  Reduce 2% damage taken. Recover 3% HP at the start of every turn.
• Christmas Wreath

  Increase agility by 1 and Max HP by 1%.
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Golden Torch of Zeus

  Recover 150 HP every turn
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.
• Curved Spear
• Hanami Dango

  Reduces damage received by 7%. Restore 85 HP every turn.