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 :

• S2 Demons erosion

  Recovers 4% of the users max HP every turn. Additional 100 damage on all attacks.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• Santa Gift Bag

  Reduce damage taken by 30.
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• 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.
• Great Wooden Hammer

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Red Ukiyo-e Kite

  4% chance to convert damage taken to HP positively and increase max. HP by 2%.
• Mimosa
• Scroll: Posion Attack
• Big Cheese

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

  Increases Max. HP by 4% and recover 3% HP at the start of every turn.
• S15 Ancient Seitenken

  Recover CP after HP reduction. (Amount: 16% of HP reduction)
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• Blue Shell
• Banana Back Item

  Banana Back Item
• Mischievous Candy

  Increase accuracy by 3%. Increase healing power of scrolls by 50%.
• S3 Fossil of Magatama

  Increase purify chance by 6%. Has 10% chance to convert damage taken to HP positively.
• Spinning Wheel

  Recover user's max HP by 1% each turn. Increases user's max CP by 2%. Converts 10% of damage taken into CP.
• Sakura Lucky Cat

  Ignore enemys dodge rate by 4% and increase 3% dodge rate.
• Moai Flagon

  Increase Max. HP by 3%. Reduce damage taken by 100.
• Straw Hat

  Increase dodge rate by 3%.
• Bell of Beast

  Recover HP by 3%. 15% chance to absorb 3% HP of enemy who attack you.
• War Flag: Syoshin

  Increase mission XP reward by 100.
• Roasted Turkey

  Restore 20 HP every turn.
• Hanami Taiko

  2011 Hanami Festival - Rhythm! Recover HP & CP by 10 every turn.
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• Brilliant Stock Pot

  Increase max. HP by 8% and purify chance by 2% but reduce max. CP by 8%.