Njen, i meant like this, it's not 5 minutes work
You are moving the goal post. The initial discussion was about creating a curvature map only takes a few minutes, not the whole full texture.
The bottom line is that using an AO map as a mask on moving and deforming objects will always give inconsistent results and render slower, that is a fact. Better to spend a few minutes in a program like Substance to guarantee perfect, and fast rendering results.