I've got 143 Mods running so far (FCOM, Reneer's, Oblivion XP, countless others), many of which include very quick startscripts when creating a new character. Usually I get to around 2-3 before the entire game freezes. Is there something I'm missing to make these more compatible or less strenuous at the beginning?

I also have a lot of scripts running at startup, bu freezing means there is a serious problem in one or more of them.
Most of those mods will debug info to the console about what they do at startup. Install http://tesnexus.com/downloads/file.php?id=26510, and after the freeze occurs and you exit to desktop, go to Data\Conscribe logs and check the static log.log. See if you can get which mod made the last debug statement and if deactivating it solves anything.

That worked perfectly, it turned out not to be the massive amounts of startscripts but rather OBGE misloading shaders.

Thank you very much sir!