might be good to collect here also what is not working?
As I already wrote in the 4X thread: http://forums.sinsofasolarempire.com/447324/get;3662725
One problem which seams to have worsen with sins 1.86 (and 1.87) is buffEntityModifierType "DamageSharing" (vanilla advent ability) causing slow down, even game stop with many ships. Without any CPU load! Seams some sort of deadlock, specific when they are attacked with area damage weapons.
Also on large maps I get random crashes, without anything particular going on (no large battles or so) sometimes even just seconds after start. On 1.86 and 1.87 preview.