Any and all of them stack well with Winstrol buddy. If you are looking for similar effects like fat loss, hardening, vascularity etc, then GW and S4 are exactly what you want
the answer in short... all of them.. each works so synergistically together.... i always recommend mk-2866 with it for the joint healing and ability to combat the sides and gw and s4 are perfect ultimate muscle hardening, strength and endurance along with fat loss... the triple stack is so ideal winstrol..