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 :

• S80 Struggle Flag

  Recover HP by 2%. Recover 7% HP with every Charge.
• S71 Magic Clock

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Sealing the soul barrel
• S15 Frozen Huge Sword

  Recupera 26% extra CP en cada recarga.
• Iron Tortoise Shell

  Reduce damage taken by 200.
• Scarlet Sword Wheel

  Increases damage by 5% and dodge rate by 3%.
• Love Ribbon

  Additional 40 HP damage upon all attack.
• Ronin Idol

  Reduce damage taken by 100 and restores 4% of users max HP.
• S52 Gold Dragon Scroll

  Reduce damage taken by 7%. Ignore targets dodge rate by 5%.
• Yolanda Rescue First Aid Kit
• S9 Akazonke Gunbai

  Increase 4% critical rate and ignore 4% targets dodge.
• Virgos Eternal Wings

  Increases agility by 1. Increases users attack damage by 3%.
• Light Cry Raijinco
• S62 Black Steel Swords

  Restores 5% of users max HP.
• Successor Fan

  Restores HP & CP by 2%. Has 7% chance to freeze enemy who attacks user (2 turn). Frozen target cannot move but damage taken is reduced by 80%.
• Shinobi Curse Battle Umbrella
• Tail of Hachibi

  Forged with chakra of the legendary tailed beast, Hachibi. Increase critical chance by 15% but reduce max. HP by 20%.
• Ishiyama Lantern

  Reduce damage taken by 49.
• Ukon Three Blades
• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• Cursed Devil

  Increase attack damage by 15%. But reduce max. HP and max. CP by 10%
• S2 Scroll Capsule

  Increase attack damage by 8%. Recover 7% cp after dealing damage.
• Scroll: Taiin
• Scroll: Double Head
• Dark Evil Sickle

  Exclusive Halloween item - the devils sickle that has 10% chance to absorb 1% HP of enemy who attack you.
• Christmas Trumpet

  Ignore enemys dodge rate by 4% and recover 3% CP with every charge.
• Rose Bouquet

  Recover CP by extra 5% per charge