Thanks!
Since it's 3D I'd like to stick to simple solutions and ray casting seemed to be the best and most efficient.
I'm a bit concerned for the enemy about the walls and similar "path-finding" stuff. When I implemented player chasing in 2D there were no obstacles...but in 3D there can be easily a pillar or a higher wall and the enemy should avoid hitting it - assuming the specific type of enemy is clever enough to do so.
I've never done any pathfinding so far in games so I'm courious what solutions I can find for Godot.