Changing NPC Stats In One Zone

[Aquaojo]

First off...Thanks to everyone in this community for the immense freaking wealth of knowledge in these boards!! I'm new to all this, but y'all have made it pretty simple!!

I've searched for this, but couldn't find anything...I'm looking to make some changes to the mobs in one particular zone. For instance: Lowering the HP of all NPC's in Crushbone.

I know how to do it for NPC's across the board, but can't seem to figure out how to identify the mobs by the zone they are in. So far I have done this by using the faction row in the NPC_TYPES table, but I'm sure there is a more thorough way...Just missing it I guess.

Any help greatly appreciated!!