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 :

• Lovely Santa Bag

  A bag that resembles Santa Claus, it emanates faint revitalizing aura. Restores 140 HP and 30 CP at the start of every turn.
• Extra Large Presents Bag

  A large present bag, but nobody knows what it contains.
• Aries Taiko

  A magical taiko used in celebrations during the Aries zodiac months. Recovers 50 HP every turn and reduces damage taken by 25.
• Deadwood Pipa
• S10 Frostguard's Bow

  A magical bow that has a very long range. Reduce target 8% CP on every weapon attack.
• Curved Spear
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• S48 Titans Hammer

  The hammer used by titans to destroy castles in ancient times. Increases attack damage by 8% and accuracy by 5%.
• S10 Frostguard's Shield

  Shield of the valiant warrior Tundra. Increase agility by 2. Has 17% Chance to stun target when attack with weapon for 1 turn.
• Paper Umbrella

  Increase dodge by 3%. Reduce damage taken by 80.
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• Axe Hammer suit

  Increases damage and accuracy by 6%. Recover 50 HP at the start of every turn.
• Orange Koi
• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• Scroll: Taiin
• Ronin Straw Hat

  Additional 100 HP damage upon all attack.
• Christmas Pudding

  Recover 200 HP and 200 CP at the start of every turn but reduce agility by 10.
• Jingle Bell

  Reduce 2% damage taken. Recover 3% HP at the start of every turn.
• Cursed Devil

  Increase attack damage by 15%. But reduce max. HP and max. CP by 10%
• Vampire Cloak

  Increase healing power of scrolls by 100.
• Cupids Flying Envelop

  A message to a far away lover.
  Reduces damage taken by 60.
  Increases max HP by 5%.
• Hidden Green Umbrella
• S14 Yabusa Knife

  Increases 4% attack damage and ignore 4% of targets dodge.
• S79 Blood Feather

  Has 15% chance to convert damage taken to HP positively.
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• S9 Warring Empire Guarding Bow

  An ancient enchanted bow with great range used in warfare. Increases accuracy by 10%. Restore 100 HP every turn.
• Purple Dragon umbrella