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 :

• S83 Four Wings

  Increase dodge rate by 8%.
• S60 Amber Jewel Wings

  Increases attack damage by 10% and increase 5% Combustion chance.
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Flag: Dragon Symbol
• S15 Ancient Seitenken

  Recover CP after HP reduction. (Amount: 16% of HP reduction)
• S69 Skull Cloak

  Increases Max. HP by 4%. Restores HP by 4%. Increase attack damage by 6%.
• Celestial Wood Raijinco
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• Ninja Bag

  Increase healing power of scrolls by 20%.
• S37 Ring of Chakra Flame

  Increase attack damage by 7%.
• S56 Curse Brush

  A legendary Ink Brush that has the ability to materialize drawings. Increase critical rate by 5% and accuracy by 6%.
• Ishiyama Lantern

  Reduce damage taken by 49.
• Screw Pattern Skis
• Sand Gourd
• 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.
• Scroll: Grassland
• Mercy Of Libra

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

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• Vertical Light

  Reduce 15 HP damage taken.
• War Flag: Furinkazan
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Purple Mixing Yellow Umbrella
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Spinning Wheel

  Recover user's max HP by 1% each turn. Increases user's max CP by 2%. Converts 10% of damage taken into CP.
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• Sakura Lucky Bag

  Increase 3% damage, 4% chance to freeze attackers for 1 turn . Frozen target cannot move but damage taken is reduced by 80%
• S75 Trifecta Swords

  It gives off a strange feeling of vigor. Restores CP by 3%. Increases max CP by 7%.