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 :

• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• Basic Jounin Battle Gear
• Umiyuki Painted Wood

  Reduce 24 HP damage taken.
• Ramen Shop Lantern
• Snowflake

  3% chance to freeze enemy who attack user (1 turn). (Frozen target cannot move but damage taken is reduced by 80%.)
• Celestial Wood Raijinco
• Cupid Wing

  Increase critical chance 4% and critical damage 10%.
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Kettle
• Scroll: Taiin
• Scroll: Kochin
• Poor Bag

  7% chance to convert damage taken to HP positively. Reduce damage taken by 5%.
• Blue Bird Wings
• Ice Cystal Raijinco
• Thanksgiving Balloons

  Increase max. HP by 2%.
• S11 Wood Spirit's Shield

  Increase max. HP by 9% and 20% chance to absorb 3% HP of enemy who attack you.
• Steel Frame Tail
• Christmas Stick

  Increase 1% damage. Recover 3% HP with every Charge.
• Rose Cloak

  Restores 80 CP at the start of every turn. Converts 8% of damage taken into CP.
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• Raccoon Tail
• Mother's Hug

  Recover 100 HP and 2% HP at the start of every turn.
• Toxic Village Poison Potion
• Taurus Wand

  A necromantic wand with a figurehead of a bull. Used by necromancers in ancient times to amplify their power. Recover 100 HP at the start of every turn. Has a 12% chance to absorb 3% HP of enemies who attack you.
• Mimosa
• Silver Torch of Zeus

  Increase mission gold reward by 300.
• Sakura Gold Jewellery

  Increases users agility by 1. Restores 3% of users max HP. Has 6% chance to convert damage taken to HP positively.