I was having a lag issue around turn 150 builders only freeze. So I played 4 or 5 games removing mods as the problem happened and turning on the mod that was not causing the issue well it turns out that Create your Pantheon was the one that I removed that stopped the issue from happening I have a better than average set up and I could hear the machine slow down just before the lag anyways I'm at turn 450 and running like a champ. I just wanted to pass this on I'm not running any lag fix mods which dint help the problem anyways. Hope it helps.