What to use depends on you, your budget and your concern. WHile 400mg/wk is not much it can be enough to cause gyno if your sensitive. If you have the funds and dont like bloat take .25 to .5mf ed arimidex. If you still want to try and control aromitization a bit but are on a tight budget try .25mg eod. If your a gambler, have plenty of nolva on hand and skip the anastrozole, use the nova if you develope sides.
Always use clomid post cycle in my book, other may recommend nolva instead.