I was reading to see if this had happened to anyone else but it appeared as if I was the only one to get this far. Their was one complaint about a guy getting to 381 and how he hacked but maybe the same thing happened to him. Basically my setup (around the ant hole clockwise) was a Quickcannon, Ice, Quick Cannon, Poision, Ice, Quickcannon. And I believe at level 80 or something they stopped leaving. I am not joking they stopped leaving. When one would finally die (their life got up to 44 thousand) the new, unfrozen, one would run to the edge of the hol get frozen and promtply run back. With my extra cash I made a bunch of snipers around them and let the game sit overnight after watching for 6 hours and being content that they weren't getting out. When I woke up the game was going incredibly slow so I lowered the quality and went to work. When I came back I had an error and the game had frozen at lvl 1387. I believe the ants life reset at some point because there is no way I could accumulate that amount of kills in 6 hours.
Anyway I have tried to recreate this set-up several times now and although I get rather good containment I have never achieved the same bone-chilling effect as I did in the previous game. A possible problem with this being the fact that I haven't made it to the high 80's in my renactments. It appears as if the AI of the ants gets worse as the game progresses. I will update if I have an more news on this.