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 :

• S12 Ancient Blood Evil Gourd

  Increase max. HP by 5%. But reduce Max.CP by 1%.
• Prestige Purple Dragon

  Increase attack damage by 5%. Recover 100 HP at the start of every turn.
• Sanmoku Gourd

  Reduce damage taken by 65.
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• Scroll: Messenger (7 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Thorn hammer
• Santa Gift Bag

  Reduce damage taken by 30.
• Victorious Crown

  Increases accuracy by 4% and recover HP by 3%. Has 13% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• Scroll: Taiin
• Scroll: Kochin
• S57 Magatama Gunbai

  Increases dodge rate by 5% and restores 4% of users max HP every turn.
• S59 Rejuvenating Blade Wings

  Increases Max. HP by 6% and Max. CP by 4%.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%.
• Golden-bound Cudgel
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• Toxic Village Poison Potion
• Dark Cry Raijinco
• Hanagara Hagoita

  Increase max. HP by 3%.
• Master Scroll

  Restores HP & CP by 3%.
• Ritual Taiko
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Matsuyama Fan

  Ignore enemys dodge rate by 6%.
• Bear of Affection

  Increase dodge rate by 3% and ignore target dodge by 3%.
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Blue Crystal Wings

  Recover 15% extra CP when charge.