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 :

• S1 Helianthus

  Restores HP & CP by 5%. Increase purify chance by 5%.
• S5 Umbrella of Spiritual Pulse

  Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover 5% CP every turn if current CP is less than 50%. Has 8% chance to reduce skill cooldown by 1 turn at the start of each turn. (Not effective on talent skills)
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Gummy Bear

  Restores CP by 2%. Reduce damage taken by 100.
• Sakura Straw Hat

  Recovers 2% of users max HP every turn.
• S8 Ancient Scroll of Golden Snake

  Increase all attack damage by 4%, and Decrease damage taken by 4%. But reduce critical chance by 1%.
• Christmas Pudding

  Recover 200 HP and 200 CP at the start of every turn but reduce agility by 10.
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.
• Ice Cystal Raijinco
• Sakura wah

  Restores HP by 3% and CP by 99 each turn.
• Tail Hunter Back Item

  Increase max. HP by 3%.
• Chakra Message Stick
• S2 Demons erosion

  Recovers 4% of the users max HP every turn. Additional 100 damage on all attacks.
• S8 Underworld Bulwark

  A phantom shield with demon soul. Reduce damage taken by 10%.
• Spirit Flag

  An inspiring banner that boosts the holders morale. Increase critical chance and dodge rate by 3%.
• Stuff Bunny

  Increase Max. HP by 2% and Max. CP by 4%.
• Tai Chi Gold Gourd

  Restores HP by 4%. Increase healing power of scrolls by 500%. Reduce target 3% CP on every weapon attack.
• Blue Cloud Umbrella

  Ignore 6% targets dodge.
• Death Wooden Coffin
• Dark World Hammer
• Butterfly Wings
• Falcon
• Ukon Three Blades
• White Guitar
• S19 Magatama Soul Barrel

  Increase 4% critical rate and ignore 4% targets dodge.
• Scroll: Flying Phoenix
• Blue Crystal Wings

  Recover 15% extra CP when charge.