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 :

• Puppet: Spider
• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• Black Silver Electric Guitar
• S8 Underworld Bulwark

  A phantom shield with demon soul. Reduce damage taken by 10%.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• 2011 Fortune Lantern

  Ninja Saga 2nd Anniversary Carnival!
• S14 Profound Pincers

  20% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Sealing Pot

  Increases Max. HP by 4% and recover 3% HP at the start of every turn.
• Spartan Shield

  Restore 100 HP every turn. Reduce damage taken by 5%.
• 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.
• Aries Taiko

  A magical taiko used in celebrations during the Aries zodiac months. Recovers 50 HP every turn and reduces damage taken by 25.
• S30 Sword Tattoo Ring

  Increase 4% critical rate and ignore 4% targets dodge.
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• Ramen Shop Lantern
• Tail Hunter Back Item

  Increase max. HP by 3%.
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Karasu Miya Falcon

  Increase dodge rate by 6%.
• Hide Guitar
• Enternal Love Scroll

  Increase 5% Combustion chance and reduce 1% damage taken.
• Sakon Three Blades
• S2 Demons erosion

  Recovers 4% of the users max HP every turn. Additional 100 damage on all attacks.
• Ronin Idol

  Reduce damage taken by 100 and restores 4% of users max HP.
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• Patriot Aegis

  A mythical shield that can block even the most vicious attacks. Increases max HP by 3%. Has a 60% chance to recover 5% of maximum HP and reduces damage taken by 75.
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• S11 Wood Spirit's Bow

  Increase critical chance 13%.
• Red Shell