Yes, path finding is basically a chapter of its own. There are also lots of other issues, like AI teamwork. There are always ways to improve your AI, but there's rarely a need for best of the best solution. Just think what you need for your game.
There's also another approach to AI. An action score system. Define all the possibilities AI can do and give points to those actions with some predefined system. The action with most score is chosen. It requires some heavy testing in balancing the scoring system, but when it works, AI can be suprisingly human-like.
There's also another approach to AI. An action score system. Define all the possibilities AI can do and give points to those actions with some predefined system. The action with most score is chosen. It requires some heavy testing in balancing the scoring system, but when it works, AI can be suprisingly human-like.