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 :

• Aries Taiko

  A magical taiko used in celebrations during the Aries zodiac months. Recovers 50 HP every turn and reduces damage taken by 25.
• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• Native Horn

  Increase max. CP by 3%, Recover 1% HP with every Charge.
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• Mercy Of Libra

  Recover 2% HP at the start of every turn. And recover 3% HP with every Charge.
• Gunbai: World Peace
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• Flame Blade Raijinco
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• Celestial Wood Raijinco
• Wood Top
• Ritual Taiko
• Shinobi Curse Battle Umbrella
• Blessed Kitty

  Bless on his master everyday, which increase 3% damage. Heal 1% HP in every turn.
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• Musashi Twin Blades
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Leopard Cat Tail
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• Dark Cry Raijinco
• Scroll: Yinyang Seal
• S67 Omni Cloud

  Increase accuracy by 6% and dodge rate by 5%.
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• Aboriginal Hunting Set

  Increase accuracy by 5% and Combustion chance 6%.
• Colorful Snowflake

  Increase agility by 1. Has 15% chance to freeze enemy who attacks user (2 turns). Frozen target cannot move but damage taken is reduced by 80%.
• Scroll: Genbu
• S9 Akazonke Gunbai

  Increase 4% critical rate and ignore 4% targets dodge.