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 :

• S49 Serpent Dragon Chakram

  An exceptional weapon crafted with serpent and dragon remains. Increases agility by 1 and accuracy by 7%.
• Sack of Hearts

  Cupids sack of hearts. Recovers 3% HP every turn. Has 5% chance to convert any damage to HP.
• Childhood Memories

  Mothers Day 2011 Limited Edition
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• Big Cheese

  Recover CP after HP reduction. (Amount: 10% of HP reduction)
• Hanami Dango

  Reduces damage received by 7%. Restore 85 HP every turn.
• Kettle
• Christmas Bag

  Reduce damage taken by 10.
• Hanagara Hagoita

  Increase max. HP by 3%.
• Scroll and Blade

  Has 11% chance to restrict enemy who attack user for 1 turn. Restriction target will not be able to use any skills. Increase critical rate by 5%. 8% chances of using Jutsu without CP.
• Love of coffee

  Prepared with love and empathy. Recovers 100 HP every turn. Increases attack damage by 4%.
• Colorful Snowflake

  Increase agility by 1. Has 15% chance to freeze enemy who attacks user (2 turns). Frozen target cannot move but damage taken is reduced by 80%.
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• Ninja Bunny Doll

  Increase 2% damage and ignore 3% targets dodge.
• FIFA Whistle

  Recover 100 CP at the start of every turn and reduces damage taken by 80.
• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• Hide Guitar
• Blue Cloud Umbrella

  Ignore 6% targets dodge.
• Super Rabbit Doll

  Increase damage by 9%.
• S1 Angelic Silverware

  Increase dodge rate by 5%. Reduce damage taken by 9%.
• Gold Wand

  Ignore 5% targets dodge.
• Newbie backpack (Red)

  Double mission XP reward in level 1 to level 10.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Yolanda Rescue First Aid Kit
• S44 Earth Caller

  Increases attack damage by 4% and max HP by 5%.
• Firefox Tail