[Pottus]

Well you can group your NPCS with custom iterators I wouldn't recommend using a multi-dimensional custom iterator for this it will make things more difficult to read. You should make a new custom iterator for each new group of NPCS for instance some might be information NPCS others Zombies so it would be nice to have each grouped in their own iterator. Of course you want all your NPCS that you will be using connected when the script starts up I think dynamically creating them is a bad idea because you won't be able to control what player slots get taken up this can cause a lot of confusion. Lastly, don't rely on the A_RNPC include my experience with it proved that it was not very useful I ended up just writing my own system based off of RNPC.inc instead. Now if you need to detect when a zombie gets shot I can certainly help you with that when the time comes.