Alright so AI is basically logic. Unless you have some syntax or impanation problem you need to set priorities and think about how you want the AI to think.

Here is something I would try.

First I would read the health of the player to see what is best suited for killing them.If the player has really high health and a single big sword swing won't give the AI an advantage I would make it choose second best to save points If the player is on it's last leg about to die I would have the AI go all out to ensure the player will die If the player has a chance to be killed by a big sword swing but the AI doesn't have enough points I would make it choose the light attack to build up quickly

AI is just logic and you should think about what's the most effective way to get the result you want which mainly involve killing the player.

Thank's everyone for all the help.

I now have a npcs that walk around and can engage in combat, the layered approach produced a great AI with out too much of a struggle.

It is the fastest-growing AI architecture out there. Between behavior trees and utility systems, you can handle most of the AI needs out there.

I have been reading up whenever I can, it's been really interesting.

I hope to implement it into my game at some time, just need to learn more.

First I would read the health of the player to see what is best suited for killing them.If the player has really high health and a single big sword swing won't give the AI an advantage I would make it choose second best to save points If the player is on it's last leg about to die I would have the AI go all out to ensure the player will die If the player has a chance to be killed by a big sword swing but the AI doesn't have enough points I would make it choose the light attack to build up quickly

I will consider this for a hard mode.

At the moment my AI always makes the best attack choice, making it really hard to win when you accidentally selected the wrong option or when you are out numbered by even one enemy.

To solve the problem I weakened the attack of regular enemy's, it's still the same for boss battles or important battles, on easy the opponent has a one out of five chance of choosing the worst possible attack.