How to prevent Civilization VII crashes with only 4GB of RAM?

Running Civ 7 with 4GB of RAM is pure self-torture; in the late game, I hit the 3.9GB limit and the game just died. I first tried disabling every system service I could find, but AIDA64 showed memory still hovering at 3.5-3.8GB, leaving me helpless. I then used the GamePP Resource Scheduler to set the game priority to Highest and forced background processes under 100MB. GamePP monitoring showed available memory jumping from 100MB to 450-600MB, while HWMonitor kept temps at 40-45℃ and CPU-Z showed 80-95% load.