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 :

• Shinobi Curse Battle Umbrella
• Colorful Snowflake

  Increase agility by 1. Has 15% chance to freeze enemy who attacks user (2 turns). Frozen target cannot move but damage taken is reduced by 80%.
• Blizzard

  Increases users agility by 1. Has 7% chance to convert damage taken into HP.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%. But reduce critical chance by 1%.
• Tail of Jyubi

  Forged with chakra of the legendary tailed beast, Jyubi. Increase attack damage by 15% but reduce max. CP by 30%.
• Scroll: Tenku
• Celestial Wood Raijinco
• S35 Mini Teiko

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

  Increases Max. CP by 10%. Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Charming Aura (Black)

  2012 Valentines day limited aura, increase critical chance 2%.
• Nutcracker

  Increases Max. HP by 4% and damage by 3%.
• Force of Taotie

  Reduce damage taken by 7%.
• Love of coffee

  Prepared with love and empathy. Recovers 100 HP every turn. Increases attack damage by 4%.
• Gemini Halo Glyph

  Increases damage by 4%. Reduce damage taken by 65.
• Mech of Battle Gear

  Increase critical chance 3% and critical damage 8%.
• Patriot Aegis

  A mythical shield that can block even the most vicious attacks. Increases max HP by 3%. Has a 60% chance to recover 5% of maximum HP and reduces damage taken by 75.
• S78 Wandering Soul

  Recover CP after HP reduction. (Amount: 15% of HP reduction) Recover 15% extra CP when charge.
• Businessman Luggage
• Taoist Spirit Stone

  Increases Max. HP by 3% and Max. CP by 5%. Increase purify chance by 1%.
• Hanagara Hagoita

  Increase max. HP by 3%.
• S13 Slaughter Giant Axe

  Increase max.HP by 20% but reduce max. CP by 35%.
• Sakura Fan

  Recover 20 HP and 150 CP at the start of every turn.
• Butterfly Wings
• Fathers Treasure

  2014 Fathers Day special back item. Doubles the TP reward from TP missions.
• Scroll: Guren
• S7 Gorgeous Butterfly

  Increase agility by 2. Recover 20% extra CP when charge.
• S5 Umbrella of Spiritual Pulse

  Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover 5% CP every turn if current CP is less than 50%. Has 8% chance to reduce skill cooldown by 1 turn at the start of each turn. (Not effective on talent skills)