Well, I'll be honest.. I haven't used anadrol, and I know in the title you specified anadrol users only, so forgive me, but I feel I can give some input here on the water retention issue:
Much of the water retention issue with anadrol could be due to increased aldosterone (a corticosteroid that regulates electrolyte/water levels within the body), therefor we could assume an anti-aldosterone could be of use to minimize water retention..
sprinolactone is an aldosterone receptor antagonist or other duiretics may be of use.
Some people like the water retention though...
Also on the note of nolvadex use, I don't know how much concrete evidence there is here; however, a wise old man once told me anadrol may have some estrogenic properties in it's self (It doesn't aromatize) so anti-aromatse drugs like arimidex and letrozol will have no effect, you will need estrogen receptor antagonists like nolvadex.