the nolvadex does not stop estrogen from getting high, it stops high estrogen from binding to the receptor site.
keeping estrogen low is a matter of either not using compounds that aromatize or using aromatization blocking drugs.
so.. one thing to consider is using anastrozole, letrozole , formestane of exemestane for a period of time.
I would add:
DIM
Calcium D glucarate (rids body of hormones through glucoronidation)
Eat as much broccoli as you can stomach as well
All these things aid in estrogen disposal
High estrogen levels crush the HTPA.