* I changed bSaveOnInteriorExteriorSwitch=0 in FalloutPrefs.ini just in case that was causing the occasional interior/exterior transition crash I was seeing. * I did not see any advantage to bUseThreadedAI=1, so I left it at 0. * With iNumHWThreads=2, the game with slow down and stutter a bit under stress, but not die. With this fixed, I then did some more testing here’s some settings to change: * Without iNumHWThreads=2, the game tends to freeze or crash under stress. It’ll prompt you to save Merged.esp, but before you press Ok, uncheck Backup plugins. Once it’s done, right click in the whitespace below the last mod on the left, choose Other, Create Merged Patch. Verify all of the mods are checked, and press Ok. Download the zip file again and import the new LoadOrder.txt out of 00-Configuration using Fallout Mod Manager as before. You need to create a merged patch to keep Mart’s raider leveled list from conflicting with the other mods and murdering the game, I think. I found a 100% repro crash outside the Fairfax ruins and used that to diagnose the issue. I think I figured out the solution though, thanks for the help so far.

Fallout mod manager crash