Each companion in has four unique skills you can upgrade throughout the game. Companions don’t level up each time you do; instead, they get a single ability point every few levels.
I beat at level 28, just two shy of the level 30 cap, and I had eight upgrade points for each companion. Since each companion ability has four possible levels, you won’t be able to fully upgrade all their abilities.
Deciding how to build a companion in is completely tied to these four abilities. This is because doesn’t let you change companion gear.
This is a bit of a double-edged sword; while it makes companions easier to manage, it also means your ability choices are more important.
Luckily, you can respec at any time if you don’t like your build for a small amount of gold. I did my first Avowed playthrough with a Ranger build, so Kai was a constant companion for me.I leaned towards making him more tanky, so he could soak up damage while I kept my distance.