Periodic freezes in stand alone build

I have had to cancel a large part of my project because a scene was producing a ‘graphics device lost, skipped frame’ error along with temporary freezes. The only solution I could find online was to turn off multi-thread rendering but that option isn’t available in the version of unity I’m using(3.4.2). I conceded to making that level a ‘lite’ version of itself but now I’m encountering a similar but more mysterious problem with the-second-to-last scene which I really can’t take much out of without pretty much ruining the game. This time there are similar periodic freezes only in the standalone build but there is no errors being reported by the output log. I have set a release date of my title at a bit less than a month from now so I’m even considering unity pro so that I can utilize the profiler but that may turn out to not be an option for financial reasons. Any help would be very appreciated. I’ve posted this in the technichal help also as I’m kind of desperate for a suggestion.

http://answers.unity3d.com/questions/224356/graphics-device-lost-direct-3d.html?sort=oldest