There is a version of the chaos edition with only 3x enemies instead of 10x (still 3x bosses) and an adjusted experience equation to compensate for the lower number of enemies.
To install it, go to your steam mod directory (something like this: C:\Program Files (x86)\Steam\steamapps\common\Titan Quest Anniversary Edition\SteamWorkshop\Cataclysm\CustomMaps) and into the chaos edition folder. You will find a "cataclysm_chaos_light" folder in there. Inside this folder, there is the "cataclysm_chaos_edition.arz file". Copy it and overwrite the file with the same name in the Cataclysm\CustomMaps\cataclysm_chaos_edition\database directory.
That's it. Start the mod and enjoy the chaos edition with hopefully a little less lag and crashes.