
Originally Posted by snobel
You were right that something was wrong, but there may have been two issues here.
First, the detailed difficulty settings on the Difficulty page would not get applied if you had the MP Gameplay mod enabled, and while you could change the Master setting on the MP Tweak Overrides page, the individual values were not available.
The difficulty tweaks get applied to the values in the [Difficulty] section of Default.ini. As it turns out, the Difficulty_AIHitPoints_Mult_* values are used differently than the others: The value for the current difficulty (say, Expert) is applied to the health properties of AI when they are created. All the other values are applied during normal play, e.g. while doing combat. Because AI creation happens early on load, the SU patch to apply the tweaks ran too late and as a result, AI health was not affected.
The way Difficulty_AIHitPoints_Mult_* is used also means that the value (and the AI Health tweak) is ignored when loading a save - AI is just reinstated with whatever health is stored in the save. So after changing the AI Health tweak option, a level transition must be made for the new value to take effect.
Both the issues have been fixed - so we'll get to have a version 1.1.11.1 bugfix release.

But for now, here's an
Update with the changes. Remember, if MP Gameplay is enabled, the values must be changed on MP's Tweak Overrides page.