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 :

• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• Scroll: Double Head
• Nutcracker

  Increases Max. HP by 4% and damage by 3%.
• Cheerful Snowman

  Increase Max. CP by 20%. Recover 2% HP at the start of every turn. but reduce max. HP by 12%.
• Hanagara Dama

  Increase max. CP by 6%
• Musashi Twin Blades
• MegaJingleBell

  A glorious Christmas artifact which can be used in battle. Ignores 5% of enemys dodge rate. Recovers 2% of users max HP every turn.
• Fighting spirit Taiko
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• GM Goldfish

  GM Goldfish
• S9 Ancient Akazonke Gunbai

  Increase critical rate and accuracy by 4%. But reduce Max.HP by 2%.
• Star Dawn Harp

  Increases users agility by 1. Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover HP by 2% when being put on a debuff.
• Swire Raijinco
• Scroll: Tenku
• Twins Sakura

  Ignore 5% targets dodge.
• S11 Wood Spirit's Bow

  Increase critical chance 13%.
• Light Cry Raijinco
• Curved Spear
• Nightmare Grudge

  Ignore 4% targets dodge.
• Sealing Pot

  Increases Max. HP by 4% and recover 3% HP at the start of every turn.
• Mirror of Thousand Hands
• Scroll: Messenger (7 Days)

  Increase 2% accuracy.
  Reduce 20 HP damage taken.
  Recover 35 HP when each turn start.
• Cornucopia

  Increase healing power of scrolls by 100%. Has 6% chance to convert damage taken to HP positively.
• S13 Slaughter Double Sickle

  Recover HP by 1%. 20% chances of using Jutsu without CP.
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• Snowflake

  3% chance to freeze enemy who attack user (1 turn). (Frozen target cannot move but damage taken is reduced by 80%.)
• Shoe of Bounty

  Increase dodge rate and critical rate by 4%.