Another be sure you have gold ninja tools they will raise your bp a lot. then once you hit 32k, you caan get more gold tolls and red tools.

List of ti's for gold tools:
Jonin - White Snake Necklace -
Jonin - Ring of God -
Jonin - Senju Broad Sword -
Akatsuki - Catastrophic Planetary Devastation -
Akatsuki - Mysterious Mask -
Akatsuki - Book of Reincarnation -
Akatsuki - Sage's Neclace
Akatsuki - Flying Raijin Dagger -
Akatsuki - Paper Shuriken

These are the best gold and red tools: (Some gold tools are better then red ones)
https://i.gyazo.com/9b85fddc179d8333084f2bdaaf83d0d9.png

Source for gold tools: link