Thinking about the weaknesses in the stance, and applying the correct angle to topple either by pushing into or pulling on uke and doing Phi suggest sounds good.
in this i think aiki is an energy minimisation problem - what is the least energy required and the optimum angle/ direction to apply it. I started exploring it as a blog
, its gets messy pretty quickly but i found some neat insights that helped my practice and ways to critically view video footage. might be something of use and happy to receive feedback on what is quite unfinished/un polished