This is gonna sound silly, but you might wanna test your ram. I had a similar situation, and whenever i set miqo to run command missions as soon as i got in, crash. I was like ok w/e ill try something else. everything was good for a few days then suddenly i started getting BSODs up until the point where it corrupted my Filesystem completely. Turned out i had a bad stick of ram which by the time i decided to test it, racked up 480000 errors. swapped out the stick the next day, reeinstalled windows, and everything was good again.
now the likelihood that your problem lies in your ram is slim, however it does sound like there is some data corruption involved. crashes that produce DX errors usually come from a bad video card, bad video card drivers (corruption) bad DX files (corruption) bad ff14 dx references (corruption). A bad stick of ram is like cancer, it can get worse and worse so it can start in one set of addresses and spread on and on until you replace it and have to do percussive maintenance.