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 :

• Evil Claw Hammer

  Reduce 7 HP damage taken.
• S15 Ancient Seitenken

  Recover CP after HP reduction. (Amount: 16% of HP reduction)
• Village Red Lantern
• S62 Black Steel Swords

  Restores 5% of users max HP.
• S36 Wind Chakra Magatama

  Increase accuracy by 3% and dodge rate by 3%.
• White Guitar
• Swire Raijinco
• Shishimai Back

  Restores 3% of users max HP.Has 4% chance to convert damage taken to HP positively.
• S31 Yabusa Dual Head Spear

  Increase 4% damage and 4% critical rate.
• Sand Gourd
• S42 Hanbing Hammer

  8% chance to convert damage taken to HP positively.
• Horror Scarecrow

  Increase attack damage by 5%. Reduce damage taken by 150.
• S77 Curse Dragon

  Increases attack damage by 9% and critical damage 10%.
• S12 Golden Bujin Ax

  Increase attack damage by 20% but increase damage taken by 12%.
• S11 Tensho Compass

  Increase attack damage by 4%, and recover HP by 1%.
• Wood Top
• Screw Pattern Skis
• Shield of Holy Beast

  Reduce 5% damage taken. 6% chance to convert damage taken to HP positively.
• S15 Seitenken

  Recover CP after HP reduction. (Amount: 20% of HP reduction)
• Rose Cloak

  Restores 80 CP at the start of every turn. Converts 8% of damage taken into CP.
• S33 Book of Fate

  Increase Max. HP & CP by 4%
• Scroll: Terminated Rock
• Gunbai: Gyoji
• Star Dawn Harp

  Increases users agility by 1. Recover CP after HP reduction. (Amount: 10% of HP reduction) Recover HP by 2% when being put on a debuff.
• Sweet Treat

  Increase critical chance by 2% and dodge rate by 3%.
• S25 Musha Pipa

  Increase 4% critical rate and ignore 4% targets dodge.
• Hanami Dango

  Reduces damage received by 7%. Restore 85 HP every turn.