It's really a matter of preference b/w nolva and clomid (or torem, for that matter). For reasons beyond the scope of this thread, some people have more "emotional" moments on clomid. Others have none. I don't know if there's a big difference in terms of recovery... personally I prefer torem. You're probably fine with the doses that you listed... many are... my gut feeling though is that first time around (I gather) you shouldn't take shortcuts. Make sure you recover fully, and then adjust next time.
Milk thistle, liv 52, NAC... there are a lot of compounds that have positive and protective effects on liver metabolism under various circumstances. There's no reason not to take something, imo, other than saving money. Everybody and his brother prefaces comments about 17aa's by saying "the dangers are overstated", but I'll feel better in 25 years knowing that I've done my best to protect myself.