just sim those systems that are in the "off screen" category like econ events ect on a cycle that doesn't cause interrupts
everything for the AI runs as usual but instead of halting in the middle of the "players" 30 day time skip the time skip keeps running even as those events that the AI perpetrate on other AI at the other end of the galaxy sim
its literaly as simple as "if the player can't see it, it does not cause the player time skip to stop"
even while the AI stops time skip, does stuff, and restarts it in the background
fancy infographic time!
although their may be a need for a "please wait while we sim the AI actually PLAYING THE GAME" waiting icon to avoid rage and "help my game is freeze" the may happen if the AI takes a really long time to play out their wars where player can not see it; loading/progress bar
[time skip is: 0=====|>---30]