I think that pattern is good for rushing to get small cargo. You need the lvl 5 deuterium synthesizer for the research of energy tech and combustion engine.
When you are lacking energy after upgrading the deuterium set the metal mine lower. After you get combustion engine 2, set metal mine to 100% and deuterium synthesizer to 80%. Yes you can upgrade the solar plant but I'd rather buy another cargo. You won't be needing much deuterium on the start anyway.
Still the difference would only set you back only a few hours or maybe a day. So it won't matter much. Unless you started with a couple of sharks.