Nathan - obviously this is a tough case. At this point it is VERY tough. But you've shown that there is hope because you've done things and have seen results.
Take a look at Dr. Schulze 's incurables program (link above to schulze) and try to see what you think is applicable and do as much of it as you can/want.
Take a look at what has worked and what hasn't - and get rid of what hasn't. Clog up the tube with stuff that works!
www.herbsfirst.com has b&b formula which may be good for the seizures. also - herbaleyebright may help with the eyes. dr. christopher lectured of curing diseases of the eye with it
You are already doing a great job. Keep your spirits up and try to get her to the best she can be.