Well, I think we fixed it. We replaced the crank position sensor, water pump, main seal, and timing belt. It seemed that the old CPS was the issue. After installing the first CPS backwards and subsequently ruining it, we finally installed it properly (which we were able to do without removing the timing belt, or the upper two timing belt covers.) It fired right up and I just finished driving her for about an hour. There was no intermittent stalling and dying like before which leads me to believe the faulty CPS was causing the issue.
word from the wise, make sure you don't do it backward, and use a feeler gauge set to .8mm to space the CPS properly. good luck anyone attempting the same repair.