First of all, I would not suggest using GW501516, after seeing the results of the study that has been floating around. Heres a clipping of it. If you want to read the whole thing, it is available online.

after tests on rats showed that at all doses, the drug rapidly causes cancers in a multitude of organs, including the liver, bladder, stomach, skin, thyroid, tongue, testes, ovaries and womb. ".

As for winstrol, I would use the least amount that will work well for you. Winstrol is still on the safer side of AAS for females, but it can still cause side effects, including deepening your voice. So less is more. Personally, I'm a much bigger fan of Anavar. Then Primo. But as for Winstrol dosing, start with 5mg ED. After a few wks, if you want to increase, go to 7.5mg or 10mg ED. I would be careful going aboce that and I would limit your use to 8 wks at a time. I would only use T3 while on ASS. I'd suggest starting at 25mcg ED and adding 12.5mcg every couple of wks, as needed. Another great compound for fat burning, that works very well for men and women alike is clen. It is great in combo with T3

As for S4, I cannot advise you, as I have not used it with femles. I have heard of good results, but have not had experience with anyone I've helped. 

Thanks for following the QA. Glad I can be here to help!