How to increase BLE Mesh Network range


Mesh SDK: v5

Using 2 nRF52DK's for range testing

I wanted to know how we could increase the node-to-node range by making changes in the firmware (Like changing tx power level and changing PHY). Please note that it is for a product release,

I found some references  and 

I wanted to know if these implementations are valid in the newest iteration of the SDK or is there a better way to perform the test. 

Thank you,