Before this mod when you select different options in the setting “Enemy difficulty”, the enemies in the game get +2AC and Attack Bonus, as well as +4 to all ability scores for each increase in the difficulty level (e.g., from Normal to Strengthened). If you give a monster +2 to AC and Attack Bonus and +4 to all ability scores, in reality, that gives the monsters +4 to hit your party and +4 to avoid your party’s attacks. I think that it is too much, and I always wanted more fine-tuning settings. That’s where I had the idea for this mod. With this mod, you can replace these bonuses. By default, this mod replaces the vanilla values to +1 to AC and Attack Bonus (instead of +2) and +2 to all ability scores (instead of +4). This gives monsters +2 to hit and to avoid attacks for each level of increase in the “Enemy difficulty” setting. However, you can change these values to whatever you like, just open the “Settings.csv” file with Excel or LibreOffice and change the values. However, I should note that I have not tested other values.
To check what each option was originally intended to do by the devs, see:
https://steamcommunity.com/app/640820/discussions/0/1730963192537352029/