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 :

• Purple Mixing Yellow Umbrella
• Curved Spear
• Black Double Gun

  Ignore enemys dodge rate by 3%. Increase accuracy by 3%.
• Virgos Eternal Wings

  Increases agility by 1. Increases users attack damage by 3%.
• S62 Black Steel Swords

  Restores 5% of users max HP.
• S69 Skull Cloak

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• Shinobi Curse Battle Umbrella
• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• Butterfly Wings
• Nightmare Grudge

  Ignore 4% targets dodge.
• Scroll: Sun of Campaign
• Togatsuki Paper Fan

  Increase max. CP by 10%.
• Ice Cystal Raijinco
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• Ink Cloud

  Additional 40 HP damage upon all attack.
• S32 Black Senbu

  Recover HP by 4% and reduces damage received by 3%.
• Mini Evil Wing

  Exclusive Halloween item - the devils wings that frighten enemy, and hence reduce their damage done on you by 5%.
• Iron Tortoise Shell

  Reduce damage taken by 200.
• Ultimate Taiko

  Recover 120 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.
• Light Cry Raijinco
• Paper Windmill

  Additional 20 HP damage upon all attack.
• Smart Phone
• Universal Backpack

  Increase healing power of scrolls by 100%. Each turn recover 140 HP.
• S2 Solar Aura

  Increase agility by 3 and accuracy by 7% .
• Scroll: Yinyang Seal
• Gummy Bear

  Restores CP by 2%. Reduce damage taken by 100.
• Santa Gift Bag

  Reduce damage taken by 30.