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 :

• Purple Dragon umbrella
• Roasted Turkey

  Restore 20 HP every turn.
• Force of Taowu

  Increases Max. HP by 4% and Max. CP by 4%.
• S29 Yanki Protective Magatama

  Increase accuracy by 8%
• Ancient Shinobi War Decorated

  Additional 60 HP damage upon all attack.
• Hanami Fan

  Ignore 4% targets dodge and increase max. HP by 2%.
• Ice Cystal Raijinco
• GM Phone

  GM Phone
• Shadow Twin Blades
• S34 Wooden Name Tag

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Scroll: Genbu
• Vampire Cloak

  Increase healing power of scrolls by 100.
• Sakura Rain Battle Umbrella
• Yatai Lantern
• Axe Hammer suit

  Increases damage and accuracy by 6%. Recover 50 HP at the start of every turn.
• Decorative Rope
• S12 Ancient Blood Evil Gourd

  Increase max. HP by 5%. But reduce Max.CP by 1%.
• 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%.
• Falcon
• Blood Brush

  Increase 3% damage and increase healing power of scrolls by 10%.
• S76 Buckler and Sword

  Increase max.HP by 12% but reduce max. CP by 2%.
• Tail of Capricorn

  Increases dodge rate by 4%. Recovers 3% HP with every charge.
• Firefox Tail
• S47 Kami's Blessing

  Increase critical chance 6% and critical damage 10%.
• Pirate Skull Flag

  Increase 6% purify chance. Reduce damage taken by 5%.
• Force of Taotie

  Reduce damage taken by 7%.
• Ink Cloud

  Additional 40 HP damage upon all attack.