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 :

• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every charge.
• Raijin Raijinco
• S10 Kikyo Umbrella

  6% chance to convert damage taken to HP positively.
• S55 Mirror of Fantasy

  Increases damage by 6% and accuracy by 5%. Has a 7% chance to convert any damage taken to HP.
• Angel Heart (White)

  16% chance to absorb 2% HP of enemy who attack you.
• Evil Way Lute

  Has a 50% chance to recover 5% of maximum HP. Has 10% chance to absorb 3% HP
• Musashi Twin Blades
• Mech of Wing

  Reduce damage taken by 10%.
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• S76 Buckler and Sword

  Increase max.HP by 12% but reduce max. CP by 2%.
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Cancer Assegai

  Increases critical rate by 4%. Reduce damage taken by 3%.
• Hide Guitar
• Shigu Twin Blades
• Carnival Fan

  Dance with the Fan during Ninja Saga Anniversary Carnival! Increase all attack damage by 3%.
• Force of Taowu

  Increases Max. HP by 4% and Max. CP by 4%.
• Scroll: Genbu
• S14 Profound Tentacles

  35% chance to restrict enemy who attack user for 1 turn. (Restriction) target will not be able to use any skills.
• S69 Skull Cloak

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• Bronze Torch of Zeus

  Increase mission XP reward by 200
• Folding Fan: Shino
• S43 Extreme Lotus

  The back item contains 30% chance to absorb 3% HP of enemy which makes attack on you.
• Love of coffee

  Prepared with love and empathy. Recovers 100 HP every turn. Increases attack damage by 4%.
• Great Wooden Hammer

  Increase healing power of scrolls by 50%.
  Reduce 8 HP damage taken.
• Big Cask

  Increase max.HP by 15% but reduce max. CP by 5%.
• Toxic Spider Web

  10% chance to apply Restriction on enemies who attacks the user for 1 turn.
  5% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%