Hey, thanks! I'm still learning both of those things, so it's great to know I'm getting them right! Also, your suggestion is quite relevant, I should add it as an update I think, to make the gameplay snappier.
About the performance, in my game I didn't have many issues since the most enemies die every 10 seconds hahaha
However, in other games I made I noticed that path finding can make the game quite slower... also, VisibilityActivators might help a bit. I think threading could help you!