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 :

• Ink Cloud

  Additional 40 HP damage upon all attack.
• Call of the Angel

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

  Recover self 2% HP, reduce 3% damage taken.
• Dragon Crucifix Spear
• Hanami Fan

  Ignore 4% targets dodge and increase max. HP by 2%.
• Frost Soul Electric Guitar
• Turkey Tail
• S9 Akazonke Gunbai

  Increase 4% critical rate and ignore 4% targets dodge.
• Knot of Avenger

  20% chance to absorb 2% HP of enemy who attack you. 20% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• Griffin Thunderball

  Increases critical rate by 3% and dodge rate by 3%.
• Huginn & Muninn

  Reduce 4% damage taken. Has 10% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Decorative Rope
• Toxic Mushroom

  Increases damage by 10% but the user takes 200 HP damage every turn.
• Butterfly Wings
• S15 Frozen Large Sword

  Increase 7% purify chance.
• Evil Way Lute

  Has a 50% chance to recover 5% of maximum HP. Has 10% chance to absorb 3% HP
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• Village Red Lantern
• Mischievous Candy

  Increase accuracy by 3%. Increase healing power of scrolls by 50%.
• Love of coffee

  Prepared with love and empathy. Recovers 100 HP every turn. Increases attack damage by 4%.
• Dark Plate Twin Blades
• S83 Four Wings

  Increase dodge rate by 8%.
• Pirate Skull Flag

  Increase 6% purify chance. Reduce damage taken by 5%.
• Ninja Bag

  Increase healing power of scrolls by 20%.
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• S2 Solar Aura

  Increase agility by 3 and accuracy by 7% .
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.