Vitex (vitex agnus castus, aka chasteberry) blocks the conversion of testosterone to estrogen. Some one else will have to comment on the stack. I use it by itself.
Do a search for vitex over at T-mag using their search engine, not the one here at the forum. Read all that comes up in the Behind the Scenes column. Also read the Supplement Round-up article under “M”.
I’ve felt it acts much like Clomid, with the added benefit of lowering prolactin levels as well, staked it with Tribex, liked it a lot. Good luck, outlaw.