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 :

• Sengoku Flag

  Increases damage by 4%. Each turn recover 120 HP.
• S42 Hanbing Hammer

  8% chance to convert damage taken to HP positively.
• Triple Taiko

  Increases Max. HP by 4% and healing power of scrolls by 100%.
• S56 Curse Brush

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

  Increase 2% accuracy.
  Additional 5 HP damage upon all attack.
• Turkey Tail
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• S5 Umbrella of Spiritual Pulse

  Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover 5% CP every turn if current CP is less than 50%. Has 8% chance to reduce skill cooldown by 1 turn at the start of each turn. (Not effective on talent skills)
• Sakura Rain Battle Umbrella
• Toxic Village Poison Potion
• Vampire Cloak

  Increase healing power of scrolls by 100.
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• Angel Heart (Black)

  Reduce target 8% CP on every weapon attack.
• Sanmoku Gourd

  Reduce damage taken by 65.
• Peom Fan

  Reduce 46 HP damage taken.
• FIFA Whistle

  Recover 100 CP at the start of every turn and reduces damage taken by 80.
• S22 Shinnoto Monks Staff

  Increase 4% critical rate and reduces damage received by 4%.
• Ninjas Stocking

  Increase 5% Combustion chance and attack damage by 3%.
• Holy Wings

  Increase accuracy by 4% and dodge rate by 3%.
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• S9 Warring Empire Bulwark

  A strong and sturdy shield. Reduces damage taken by 35% but reduces the user's agility by 15.
• Universal Backpack

  Increase healing power of scrolls by 100%. Each turn recover 140 HP.
• Training Dummy

  Increases accuracy by 5% and dodge rate by 4%.
• Vertical Light

  Reduce 15 HP damage taken.
• Mercy Of Libra

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