xplosys,
Is correct.
Its a well know fact that currently NPC's cannot target any other entity specifically.
There awareness is limited to that which is hard coded into the engine.
The issues and there are many are more complex than may at first seem and too complex to debate here.
There are quite a number of changes that would be required to the hard coded stuff in the engine, the source and availability to users of a wider range of script commands and actions before users would be able to accomplish anything like advanced or credible NPC behaviours for use in games - setting up teams or allies and so forth. A targeting and group system would be paramount.
Other issues like AI think time, lagg, pathfinding, collision, physics and object avoidance need improving before one could seriously set up any successful team communications or groups to help the player or have say enemies fight with one another in a free for all or across group battle between friendlies and enemies.
Attempting such is sure to result in failure and even if some of the pre-requisites were missing - one almighty mess.
Users should forget this and await the update unless you have the free time to put into experimentation which might be best spent currently on other areas of your game making endeavours.
"I am and forever will be your friend"