A collection of mods built around dolynick's Faction Add-On for Star Ruler 2.
This is a shot of two Super Star Destroyers in the Sandbox, each with several thousand Tie Fighters deployed and attacking. Each Tie Fighter is using raider style movement, so the entire cloud is in motion as they engage in a massive dogfight in space.
This was a test of how many fighters could be active at once using dynamic combat. I believe there were at least 4,000 total here (it has been a while since the test and the shot was taken) and it ran well for this test.