This mod allows you to take all perks for free, plus 500 for stats at the First level up (further, as usual).
Battle Brothers: Cheat (Free stats and perks) Free Download
One of the perks, Level Up, so you can pump the mercenary right away.
Installation:
1. Copy the data folder to the root folder of the game.
2. Start a new game,
Mod is not mine, I don’t remember where I downloaded it.