This mirage business is very interesting in that I have several different theories on what helps you see through the mirage and I do not have any sort of a good way to reconcile how it works theoretically. I found some academic materials on interaction between beam propagation and turbulence. Perhaps, it will shed some light.
Of all of the scopes I tested over the years, Tangent Theta and March help you with mirage the most. Yet, in terms of how they are optimized, they are very different from each other. At the moment, I do not know how to reconcile it all together.
ILya