Obviouisly there are many variables and each person responds somewhat differently, however if you're looking for opinions.....
1st, I do not run nolva from the start unless I had problems on the last cycle and even then I delay the nolva until I am 1-2 weeks into the cycle. If you're looking to control bloat, I find arimedex works better in conjunction with the cycle. However when I do run nolva as a precaution I take 1 tab (20mg?) EOD.
KR