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 :

• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• Chromaflake

  Increases damage by 5% and dodge rate by 3%.
• Ichimoku Gourd
• Puppet: Hakuki (3 Days)

  Increase 3% accuracy.
  Reduce 46 HP damage taken.
  Recover 83 HP when each turn start.
• Ninja Postman Bag

  Increase healing power of scrolls by 50%.
• S83 Four Wings

  Increase dodge rate by 8%.
• S17 Scorching Sun Lantern

  Recover 10% cp after dealing damage.
• Steel Frame Tail
• Light Cry Raijinco
• Luckey windmill

  Each turn recover 120 HP and 120 CP.
• S14 Profound Pincers

  20% chance to freeze enemy who attack user (1 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Native Drum

  5% chance to convert damage taken to HP positively.
• 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.
• Red Shuriken Skis
• Ninja Snowman

  3% chance to convert damage taken to HP positively.
• S35 Mini Teiko

  Increase agility by 1 and ignore enemys dodge rate by 2%.
• White Guitar
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Carnival Fan

  Dance with the Fan during Ninja Saga Anniversary Carnival! Increase all attack damage by 3%.
• Flame Blade Raijinco
• Four-Point Shuriken
• Civet Cat Tail
• Deadwood Pipa
• Love Ribbon

  Additional 40 HP damage upon all attack.
• Businessman Luggage
• GM Goldfish

  GM Goldfish
• GM Phone

  GM Phone