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.
• Scroll: Fire and Earth
• Red Shuriken Skis
• 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.
• S5 Possessed Koto

  Increase purify chance by 7%. Reduce jutsu CP consumption for 10%. Has 15% Chance to stun target when attack with weapon for 1 turn.
• Carnival Fan

  Dance with the Fan during Ninja Saga Anniversary Carnival! Increase all attack damage by 3%.
• Heian-kyo Shamisen
• S67 Omni Cloud

  Increase accuracy by 6% and dodge rate by 5%.
• S34 Wooden Name Tag

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Ninja Bag

  Increase healing power of scrolls by 20%.
• Sakura Rain Battle Umbrella
• Angel Heart (White)

  16% chance to absorb 2% HP of enemy who attack you.
• Charming Aura (Red)

  2012 Valentines day limited aura, increase all damage 2%.
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• Flame Soul Electric Guitar
• Shoe of Bounty

  Increase dodge rate and critical rate by 4%.
• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• Flag: Dragon Symbol
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• Champion Cup!

  Ultimate prize for Champions.
• Banana Back Item

  Banana Back Item
• Assault Kite

  Recover 100 HP and 80 CP at the start of every turn.
• Mirror of Thousand Hands
• Dual Blade of Fire

  Increase 3% damage made, recover self 2% HP each turn.
• Big Cheese

  Recover CP after HP reduction. (Amount: 10% of HP reduction)