In this case i'll better search for trainers or cheat engine tables so i can get this perks without any grind.
Hm. If that would suffice, you could try Universal UE4 Unlocker (it runs on Unreal Engine 4 so it should work) to get to the console and I am sure there are some console commands that can do that for you.
I think best option would be something like: PlayerLevel 40
Or whatever command they use to set player level. set.player level 40?
add.player perkpoint 20
I don't know any console commands, but if you google console commands I am sure there's some. If you find one that does any of those I am guessing might be in, that could help you to achieve the end result you want. Maybe not the way you would want, but at least it would get you there.