Is it possible that you could make the vanilla + base game DLC version of this mod (and perhaps with disabling circus events)? I believe that would be very convenient.

Well the error messages are expected given how it references many modded heroes that you don't have, as for the crash im not entirely sure how the game handles files for hero classes that don't exist, so it may be very possible that it could crash the game. Try deleting everything except for base.town_events.events.json, flagellant.town_events.events.json, shieldbreaker.town_events.events.json, and flagellant.info.darkest. Of course keep the folders those files are in as well.

i tried this mode on its own, it gives a few error messages, then crashes the game