I have Realistic Fatigue, and that is more than a good start. I adjusted the values so that PC and characters get fatigued way more easily than the defaults (just try to swing your arms around, much less swing a 40 lb sword around and see if you can do it non stop for 45 seconds while running after a thief without getting exhausted...)
The problem is, though this mod is good, and some of the values I've set to my tastes have made the NPCs able to get tired and fall down or stagger... their AI is stupid, and they don't take the fact that their fatigue is now important into account. This leads them to fall down fatigued TOO MUCH now in some cases, or collapse while chasing you because they just keep going full tilt until their fatigue is dry. Is it too much to hope that there is a mod already out there that sets the AI of NPCs such that when their fatigue drops below a percentage they 1) STOP RUNNING, 2) Don't power attack 3) Adpot a defensive posture (block, walk back and forth, dodge... but don't attack as much) ?
Also, if the above could be modded, it would also be great if for every so many seconds, say 10, fatigue was below a very low percentage.. say 10% or lower, that health is drained 1 point cumulatively (die of exhaustion).
I'm just not that good with the construction set, so if these types of mods don't already exist, could anyone point me to a VERY comprehensive tutorial about how to apply scripts to npcs via tokens and some pointers about the types of values I'm going to need to modify?