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 :

• Scroll: Grassland
• Grand Light Gourd

  Increase 3% damage
• Twins Sakura

  Ignore 5% targets dodge.
• S52 Gold Dragon Scroll

  Reduce damage taken by 7%. Ignore targets dodge rate by 5%.
• Blizzard

  Increases users agility by 1. Has 7% chance to convert damage taken into HP.
• Sakura Lucky Bag

  Increase 3% damage, 4% chance to freeze attackers for 1 turn . Frozen target cannot move but damage taken is reduced by 80%
• Nutcracker

  Increases Max. HP by 4% and damage by 3%.
• S21 Rokulin Gunbai

  Ignore enemys dodge rate by 8%.
• Scroll: Double Head
• Red Koi
• Shadow Umbrella
• Bell of Beast

  Recover HP by 3%. 15% chance to absorb 3% HP of enemy who attack you.
• Gunbai: World Peace
• Taurus Wand

  A necromantic wand with a figurehead of a bull. Used by necromancers in ancient times to amplify their power. Recover 100 HP at the start of every turn. Has a 12% chance to absorb 3% HP of enemies who attack you.
• Sakura Straw Hat

  Recovers 2% of users max HP every turn.
• Large Wooden Hammer
• Bell of Fortune

  6% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• S2 Scroll Capsule

  Increase attack damage by 8%. Recover 7% cp after dealing damage.
• Puppet: Spider
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• Wings of Eternal Eclipse

  Increases critical chance by 3%. Ignores 6% of the targets dodge rate.
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• Cornucopia

  Increase healing power of scrolls by 100%. Has 6% chance to convert damage taken to HP positively.
• Scroll: Genbu
• GM Goldfish

  GM Goldfish
• Red Shuriken Skis
• Dark Secret Seal

  Increases critical chance by 4%. Has 12% chance to Restrict anyone who attacks the user.