Low Poly Finished- High Poly Unnecessary?

I feel the low poly is high detailed enough while being under 10000 tris to not require a high poly, or at least a high poly in zbrush. Programs like Quixel and Substance Painter should allow me to draw any additional normal information onto the normal map. If I use the cage method but use the low poly for both definitions in xnormal, this should give me a functional normal map and AO map

I have also started to UV the mesh. I am currently doing it in segments as I am still unsure which approach is best; having three separate meshes or to have a singular mesh.