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 :

• Vertical Light

  Reduce 15 HP damage taken.
• Golden Torch of Zeus

  Recover 150 HP every turn
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.
• Osuzu Shinsen

  Ninja Saga 2nd Anniversary Carnival! Increase all attack damage by 5%.
• Evil Claw Hammer

  Reduce 7 HP damage taken.
• Genin backpack (Blue)

  Double mission XP reward in level 11 to level 20.
• First-Aid Kit

  100% of the purchase price will be donated to Japan earthquake relief.
• Basic Jounin Battle Gear
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• Dark World Hammer
• Soul Capturing Hammer

  Recover self 2% HP, reduce 3% damage taken.
• Ultimate Taiko

  Recover 120 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.
• Flame Blade Raijinco
• Hanagara Hagoita

  Increase max. HP by 3%.
• Dark Plate Twin Blades
• Four-Point Shuriken
• Santa Gift Bag

  Reduce damage taken by 30.
• Red Shell
• S82 Amethyst Skull

  Increase purify chance by 5%. Recover 15% extra CP when charge.
• S51 Enchanted Winged Carapace

  Increases accuracy by 3%. Recover 4% HP at the start of every turn.
• Butterfly Wings
• Hidden Green Umbrella
• Dark Evil Sickle

  Exclusive Halloween item - the devils sickle that has 10% chance to absorb 1% HP of enemy who attack you.
• Father's Heart (II)

  Reduce damage taken by 7%. Reduce damage taken by 150.
• Wind Storm Raijinco
• Decorative Rope
• S5 Possessed Koto

  Increase purify chance by 7%. Reduce jutsu CP consumption for 10%. Has 15% Chance to stun target when attack with weapon for 1 turn.