Enlighten VS Render to texture

Hi all, I'm working on architectural scenes in unity 5. My question is, what is the best practice for performance on mobile devices, ipads/iphone/androids... Do you bake your lighting/textures using enlighten or do you use render to texture(R2T) in max (or equivalent) ? if you use R2T, do you use unity 5's standard material + directional light? or unlit texture? also is it still worth using marmoset skyshop or has this become unnecessary now? Thanks