Dia-IonX would be a good thing to do to help your dog. You cannot stop the other medications unless you have proof that her system has returned to function. Dia-IonX stimulates enzyme systems in the body to help restore cellular function; Dia-IonX is also a free radical scavenger and helps slow down cataract formation. To regulate diabetes there are some beneficial things to do.
Feed a diet that is noted to be good for a dog with diabetes and give digestive enzymes with it. I also like to give probiotics, MSM, and a high quality fish oil. These all work synergistically to promote healing. If you do these things, monitor the blood glucose levels or the amount of sugar being passed in the urine. If there is more insulin present or it becomes more functional, you will need to lower the amount of insulin you are giving, because it will make the blood sugar low. It is more dangerous for the blood sugar to drop too low than to have it slightly high. Also, making regular moderate exercise a priority for dogs seems to help stabilize blood sugar levels. Lastly, please provide adequate amounts of non-chlorinated water or purified water. It helps to cleanse the cells and purified water is better for the thyroid, too.
Sorry, I didn't make life simpler for you now, but with time you should be able to phase out some of the other medications as the body begins to heal. Our goal is to avoid the complications of diabetes.