I lock my back in a "T" and start the target address by pointing my shoulders in-line at the target, and that includes elevation as well as windage. Lean into a low target from the waist or up from the waist for elevated targets. This makes for a closed stance - but that gives me a longer draw and more "oomph" for the bow. In doing this my foot placement is less of an issue. On slopes I may keep my right foot well behind me to "outrigger" for balance, and I can lean far forward to get under brush or branches keeping the same upper-body platform. Works even if you have to twist at the waist, and I practice that often - even taking shots with my toes pointing away from the target.