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 :

• Chakra Message Stick
• Puppet: Spider
• Angel Wings

  Increase 3% attack damage and ignore 3% targets dodge.
• Folk Folding Fan
• Four-Point Shuriken
• Wooden Repeating Crossbow
• S13 Slaughter Giant Axe

  Increase max.HP by 20% but reduce max. CP by 35%.
• Skull Twins

  7% chance to convert damage taken to HP positively and 20% chance to absorb 1% HP of enemy who attack you.
• Thorn hammer
• Ocean Ring

  Increase 1% accuracy.
  Additional 2 HP damage upon all attack.
• Mini Octopus
• Bronze Torch of Zeus

  Increase mission XP reward by 200
• Blue Bird Wings
• Python Scales Raijinco
• Nightmare Grudge

  Ignore 4% targets dodge.
• Tail Hunter Back Item

  Increase max. HP by 3%.
• S39 Spike Hammer

  Increase accuracy by 10% but reduce max. HP by 10%.
• Rose Cloak

  Restores 80 CP at the start of every turn. Converts 8% of damage taken into CP.
• Blood Brush

  Increase 3% damage and increase healing power of scrolls by 10%.
• Vampire Cloak

  Increase healing power of scrolls by 100.
• S51 Enchanted Winged Carapace

  Increases accuracy by 3%. Recover 4% HP at the start of every turn.
• Heart Aura

  Hidden feelings emerges! Recovers 2% of the user's max HP and 100 HP every turn.
• Carrot Time Bomb

  Has 8% chance to freeze enemy who attacks user (1 turn). Frozen target cannot move but damage taken is reduced by 80%. Has 5% chance to convert damage taken to HP positively.
• 4th Anniversary Back Item

  Ninja Saga 4th Anniversary edition! Recover 50 HP and 150 CP at the start of every turn.
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• Karasu Miya Falcon

  Increase dodge rate by 6%.