I occasionally have random crashes (most of which I attribute to my machine), as opposed to other crashes, which I can attribute to the game (that I can validate if I reload/replay the same event and the same crash/glitch happens consistently). For machine crashes, I'd say drop your settings to improve performance, clean you machine to have as little running in the background as possible, etc. For game crashes, sometimes I've gone back a couple saves and whatever sequence/event(s) that tripped up the game sometimes don't happen and I get through/past the week, sometimes auto-resolving is the way to go. For example, a couple weeks ago I posted about the Flashblind airspeeder transport model in space battles was like 10x it's normal size and would 100% crash the game (this luckily got fixed asap), but there was no other option to keep my game moving forward except delay the attack to not catch those units in space or auto-resolve those handful of space battles I couldn't get out of. Save often. I save after each engagement because of potential for glitches/crashes, but thankfully, they are few and far between. Hope this helps.

In my latest AOTR and TR campaigns I had about 2-4 crashes on average(you will never be able to eliminate crashes fully so always save often, in separate files, never during battles and never save close to end or start of cycle to avoid multiple save files getting corrupted) so it is definitely possible to setup the game to be stable.

The problem is that as the base game is old the tweaks to achieve stability may vary depending on your PC setup and some/most people never have stability issues (until they suddenly do).

Personally I "believe" that these improved stability for *me*, try googling "eaw random crashes" or similar for more tweaks (there are many you can try...) :

1) Starting the mod using the STEAMMOD=... launch option, this because the in-built FOC mod launcher is not very stable
2) Disabling steam overlay in steam settings
3) Setting win xp compativility mode by right-clicking the two exe files (foc/starwarsG) and checking that option for these files
4) In ground battles, be wary of enemy heroes as they sometimes may cause crashes (base game issues) - if you suspect this to happen use scouts to find them and nuke them from orbit before they can engage you
5) If you cannot fulfil a battle without a repeatable crash then autoresolve it
6) If the galactic map freezes i.e. acts like it is paused, look for the crossed swords battle icon on the map, reload a previous save, and rush that location/planet to prevent said AIvsAI battle that hangs to happen
7) Ensure you have no outdated submods running
8) Try verifying integrity of game files in steam just in case some file got corrupted