it does seem like a good idea, but why not just stick with the nnp all the way through?
im about to start a sust/ nnp cycle myself with 20 mg's of nolva to keep off water, plus i had gyno as a teen. i also realize it wont help with progest gyno, but i will only be running 300 mg's a week of the nnp, so hopfully it wont be an issue!