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 :

• Sakura Dance

  Increase damage by 3% and max. HP by 4%.
• Mini Goldfish
• S13 Slaughter Giant Axe

  Increase max.HP by 20% but reduce max. CP by 35%.
• S3 Fossil of Magatama

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

  Increase critical chance 4% and critical damage 10%.
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• S38 Genrei Fan

  Increase max.CP by 50% but reduce max. HP by 20%.
• Scroll: Messenger

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• S27 Golden Gourd

  Recover 5% HP with every Charge.
• Carp Flag
• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• S42 Tendo Tips

  Increases attack damage and reduces damage received by 5%.
• Bronze Torch of Zeus

  Increase mission XP reward by 200
• Blue Crystal Wings

  Recover 15% extra CP when charge.
• Grave of the Undying

  Increase purify chance by 8%, but decrease agility by 15.
• GM Goldfish

  GM Goldfish
• Christmas Wreath

  Increase agility by 1 and Max HP by 1%.
• Taurus Wand

  A necromantic wand with a figurehead of a bull. Used by necromancers in ancient times to amplify their power. Recover 100 HP at the start of every turn. Has a 12% chance to absorb 3% HP of enemies who attack you.
• S65 Transcendent Flame Wings

  Remnants of a powerful fire spirit. Increases attack damage by 7% and increase 20% Combustion chance. (Minimum requirement of 1 Attribute Point in Fire to activate combustion effect)
• Mimosa
• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• 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.
• Ink Cloud

  Additional 40 HP damage upon all attack.
• Big Cask

  Increase max.HP by 15% but reduce max. CP by 5%.
• Sakura Lantern

  Increase Combustion chance by 10%.(Minimum requirement of 1 Attribute Point in Fire to activate combustion effect). Has 10% chance to absorb 2% HP of enemy who attack you.
• S56 Curse Brush

  A legendary Ink Brush that has the ability to materialize drawings. Increase critical rate by 5% and accuracy by 6%.
• S71 Magic Clock

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