I noticed in the ACValhalla.ini file that even though I have Tobii Eye Tracking turned off in options it was still turned on in the ACValhalla.ini. So I changed the line under Options that said TobiiEnabled=1 to TobiiEnabled=0
My last CTD was just after starting Templebrough fortress raid ..... Since changing the ACValhalla.ini file I completed the rest of the quests in the Ledecestrescire chapter, all the quests in the Grantebridgescire chapter and all the quests in the East Anglia chapter plus a bunch of World events and raids as well as the first quest in Asgard without a single crash.
Tobii Eye Tracking doesn't seem to use the ACValhalla.ini file anymore (changing the setting in game doesn't change the ACValhalla.ini file) but apparently it was used sometime during development and what I suspect is going on here is there are some rogue code in a couple of routines that are still trying to make a call to the ACValhalla.ini and the game thinks Tobii is enabled when it isn't and it pukes to the desktop.
I need some people with otherwise stable game (Meaning no low FPS or CPU/GPU usage problems) to verify this. There still could be a couple of crashes in the game where you crash every time due to other bugs but this should stop most of the completely random CTDs out of nowhere .... At least it has for me so far in about 15-17 straight hours of gameplay in several different areas