In order to help with performance when using a mod that spawns a lot of ai all at once I threw together some of my AI modification tools and spawn logic into an override mod that should work with most other AI mods as it only applies at runtime through multipliers.
This basically breaks any spawn logic into segments so that when npcs are pooled it spawns smaller batches of them at a time hopefully helping with the sudden spike in cpu usage.
*Stripped this out of one of my larger mods, it might have some bugs, let me know how it works for you, if it effects performance at all for you. Thanks for your feedback. *