On Emperor getting ancient age wonders became totally impossible for me. The only one I managed in this recent game was SoZ and that only due to the fact I monopolized Ivory. Now in middle ages the chances somewhat improved. I lagged only few techs behind the tech leader (Iros) and concentrated on the upper branch to total neglect of all lower branch techs in attempt to get some wonders. I tried for copernicus and adam smith to accelerate my research, used great library and sisitine as prebuild to copers, unfortunately sistine got completed two turns before astronomy but astronomy gave an SGL to get copers and now prebuilding adam smith with palace. Is this generally a viable strategy for Emperor?