Just run the a'dex as prescribed by your doctor. It is going to do a very good job of lowering your estro. You will lose a bit of water weight and bloat and have a cleaner, lighter feel to yourself. TRT could also be beneficial, but remember, raised test will mean raised estrogen. If you plan on being on an ai for a while, I'd suggest aromasin over anastrozole. It has less of a negative effect on your lipids over a lengthy period of time, does just as good of a job lowering E and has a great ability to lower SHBG.
To answer your other question, yes, you can take all of your normal supps with the a'dex.