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 :

• Toxic Mushroom

  Increases damage by 10% but the user takes 200 HP damage every turn.
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• Bell of Fortune

  6% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Folk Folding Fan
• S16 Umbra Fire Wheel

  Additional 170 HP damage upon all attack.
• Minotaurs Horn

  Recover 350 HP at the start of every turn. Has 15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Snowflake

  3% chance to freeze enemy who attack user (1 turn). (Frozen target cannot move but damage taken is reduced by 80%.)
• Thorn hammer
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Carnival Fan

  Dance with the Fan during Ninja Saga Anniversary Carnival! Increase all attack damage by 3%.
• Leopard Cat Tail
• 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.
• Purple Dragon umbrella
• Grand Light Gourd

  Increase 3% damage
• Charming Aura (Red)

  2012 Valentines day limited aura, increase all damage 2%.
• Sack of Hearts

  Cupids sack of hearts. Recovers 3% HP every turn. Has 5% chance to convert any damage to HP.
• Book of Slate

  Decreases Max. HP by 1% and Increase Max. CP by 10%. Increase 3% purify chance.
• Universal Backpack

  Increase healing power of scrolls by 100%. Each turn recover 140 HP.
• Folding Paper Fan
• S1 Helianthus

  Restores HP & CP by 5%. Increase purify chance by 5%.
• S39 Spike Hammer

  Increase accuracy by 10% but reduce max. HP by 10%.
• Great Wooden Hammer (3 Days)

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Paper Envoy of God

  Increases attack damage and reduces damage received by 4%
• Red Koi
• Gold Wand

  Ignore 5% targets dodge.