BlackView P2 comes with a stock recovery through which you cannot install anything.
Root is attained through a signed internal SuperSU binary.
I would like to install TWRP custom recovery so I can install my own root method - magisk systemless root - which is by far superior to SuperSU.
Where can I get TWRP for BlackView P2 ?
I would suggest a Magisk systemless root method in the following upgrades /releases of Blackview P2 and other BlackView phones.
You can use Google's Safety net or play Pokemon go or use any other feature that does not work on rooted phones if your root method is systemless like as provided by Magisk.
Through the Magisk app you can also install very useful modules - like the application systemizer - it makes an application behave like it has root without you giving it root - hence safety is greatly increased.