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 :

• Ame no Kemagatama

  Increase 3% accuracy.
  Additional 30 HP damage upon all attack.
• S42 Hanbing Hammer

  8% chance to convert damage taken to HP positively.
• War Flag: Syoshin

  Increase mission XP reward by 100.
• Scroll: Guren
• Red Koi
• Senior Kari Bagpack

  Reduce 3% damage taken.
• Yolanda Rescue First Aid Kit
• Cheerful Snowman

  Increase Max. CP by 20%. Recover 2% HP at the start of every turn. but reduce max. HP by 12%.
• Wind Storm Raijinco
• Mousetrap

  15% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills.
• S83 Four Wings

  Increase dodge rate by 8%.
• Ronin Idol

  Reduce damage taken by 100 and restores 4% of users max HP.
• Native Drum

  5% chance to convert damage taken to HP positively.
• Red Shell
• Super Rabbit Doll

  Increase damage by 9%.
• Triple Taiko

  Increases Max. HP by 4% and healing power of scrolls by 100%.
• Scroll: Red Curse seal
• S26 Bashosen

  Increase 10% Combustion chance.
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Three-stringed Lute Guitar
• Champion Cup!

  Ultimate prize for Champions.
• Togatsuki Paper Fan

  Increase max. CP by 10%.
• S73 Smite Evil Shield

  Has 25% chance to absorb 2% HP of enemy who attack you. 8% chance to convert damage taken to HP positively.
• S12 Golden Bujin Jitte

  Increase dodge rate by 10%.
• S14 Yabusa Knife

  Increases 4% attack damage and ignore 4% of targets dodge.
• Bronze Torch of Zeus

  Increase mission XP reward by 200
• 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.