Hello eddieballgame! Thank you for posting.
The Combat XP Scale Factor is applied to all combat Experience Point awards.
You can set a fractional number such as 0.5, 0.25, 1.5, etc.
Anything above 1 means that the party members will get more than the standard award. For example, if you set 1.5, they will get 50% more combat Experience Points.
Anything below 1 means that the party members will get fewer XPs than the standard award. As a result, they will be levelling up more slowly.
The setting can be overridden by the module's script commands. That is the case in Augury of Chaos. Therefore, changing this module setting for Augury of Chaos will have no effect.
Cheers! Best regards