To be more constructive:
- Stamina, fatigue should be set in difficulty level;
- game timing is not "real-life" timing as you should end a mission, within hours instead of days. With "real-life" tempo, you kill gaming without adding in immersion. Crossing Altis can't take several hours without any boring;
- AI mus have the same difficulties as players, in a normal use (say veteran), more difficulties in beginner, less in elite.
And furthermore, stamina/fatigue should imped on AI skill. There are so many things to do here! Immersion is broken by AI shooting through walls, vegetations, and ability to fire a magical dead shot after being badly hurt! How many times AI, who are shot at legs, start to walk, face you, (prone or not) and kill you in one shot?