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 :

• Musashi Twin Blades
• Christmas Wreath

  Increase agility by 1 and Max HP by 1%.
• GM Phone

  GM Phone
• Enternal Love Scroll

  Increase 5% Combustion chance and reduce 1% damage taken.
• Wood Top
• Raccoon Tail
• GM Goldfish

  GM Goldfish
• S16 Umbra Fire Wheel

  Additional 170 HP damage upon all attack.
• Engagement Ring

  Additional 20 HP damage upon all attack.
• Sakura Dance

  Increase damage by 3% and max. HP by 4%.
• Smart Phone
• Nightmare Grudge

  Ignore 4% targets dodge.
• S58 Scroll of Shadows

  Increases damage by 6% and dodge rate by 5%.
• S62 Black Steel Swords

  Restores 5% of users max HP.
• Scroll: Sun of Campaign
• Celestial Wood Raijinco
• Black Silver Electric Guitar
• Fire Symbol Guitar
• Kettle
• S10 Frostguard's Bow

  A magical bow that has a very long range. Reduce target 8% CP on every weapon attack.
• Clear Cross

  Increase 3% purify chance. Each turn recover 150 HP and 150 CP.
• Drum of Euphoria

  Recover 3% HP at the start of every turn, and recover 3% HP with every Charge.
• S17 Scorching Sun Scroll

  Has 30% chance to absorb 1% HP of enemy who attack you.
• S14 Profound Tentacles

  35% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%.
• S4 Bladed Wings

  Reduce damage taken by 400. Recovers 1% of the user's max HP
• Carrot Launcher

  Increase agility by 1. (Easter 2011 Limited Edition)