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 :

• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• S9 Warring Empire Guarding Bow

  An ancient enchanted bow with great range used in warfare. Increases accuracy by 10%. Restore 100 HP every turn.
• Flag: Dragon Symbol
• Toxic Village Poison Potion
• S16 Umbra Fire Wheel

  Additional 170 HP damage upon all attack.
• S1 Helianthus

  Restores HP & CP by 5%. Increase purify chance by 5%.
• S5 The Guider

  Increase purify chance by 7%. Recover 8% HP when purify. Recovers 4% of the user's max HP.
• S13 Kishu Twin Blades

  Increase accuracy by 8%
• S18 Kamimachi Lantern

  Increase 4% critical rate and recover HP by 1%.
• Universal Backpack

  Increase healing power of scrolls by 100%. Each turn recover 140 HP.
• S58 Scroll of Shadows

  Increases damage by 6% and dodge rate by 5%.
• Cornucopia

  Increase healing power of scrolls by 100%. Has 6% chance to convert damage taken to HP positively.
• Aries Taiko

  A magical taiko used in celebrations during the Aries zodiac months. Recovers 50 HP every turn and reduces damage taken by 25.
• Champion Cup!

  Ultimate prize for Champions.
• S66 Dark Wings

  Remnants of a powerful dark spirit. Increases attack and critical rate by 4%. Increases accuracy by 5%.
• S13 Slaughter Giant Axe

  Increase max.HP by 20% but reduce max. CP by 35%.
• Carp Flag
• Sakon Three Blades
• Magical Wreath

  Recover HP by 2% and reduce 4% damage taken.
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• S14 Ancient Yabusa Knife

  Increases attack damage 4% and ignore 3% of targets dodge.
• Python Scales Raijinco
• S2 Solar Aura

  Increase agility by 3 and accuracy by 7% .
• Spartan Shield

  Restore 100 HP every turn. Reduce damage taken by 5%.
• S8 Sign of Corruption

  Wings with an ominous aura. Increases agility by 3.
• Minotaurs Horn

  Recover 350 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.
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.