Considering plenty of the fights need to assign spots, they would need to raise a whole different structure where you can assign your spot for the fight and have the rest of the NPCs adapt. Not only that, having Savage be clearable or farmable solo would require the NPCs know the fight flawlessly and do the DPS that is required of them. If they make it so, what incentive would there be for PF or Static raid groups?

But, above all, I would rather not have the Multiplayer in MMO be more and more eroded to the point that the only place with human players is Limsa. If you're frustrated over having to clear the optional challenges with people, you should probably consider moving to single player games, which are bound to offer a much better experience, overall.